diff --git a/bookindex.md b/bookindex.md
index 7e8bb4ef7..bbe4a51ed 100644
--- a/bookindex.md
+++ b/bookindex.md
@@ -14,7 +14,7 @@
  - -b: [Cookie engine](http/cookies/engine.md#cookie-engine), [Reading cookies from file](http/cookies/reading.md#reading-cookies-from-file), [Writing cookies to file](http/cookies/writing.md#writing-cookies-to-file), [New cookie session](http/cookies/newsession.md#new-cookie-session), [Web logins and sessions](http/browserlike.md#web-logins-and-sessions)
  - --basic: [Authentication](http/auth.md#authentication)
  - BearSSL: [lib/vtls](source/layout.md#lib-slash-vtls), [TLS libraries](build/tls.md#tls-libraries), [`<features>`](internals/tests/file-format.md#sect--less-than-features-greater-than)
- - bindings: [Confusions and mix-ups](project/name.md#confusions-and-mix-ups), [The library](project/does.md#the-library), [In website backends](project/users.md#in-website-backends), [docs](source/layout.md#docs)
+ - bindings: [Confusions and mix-ups](project/name.md#confusions-and-mix-ups), [libcurl, the library](project/does.md#libcurl-the-library), [In website backends](project/users.md#in-website-backends), [docs](source/layout.md#docs)
  - BoringSSL: [TLS libraries](build/tls.md#tls-libraries), [BoringSSL](build/boringssl.md#boringssl), [Restrictions](usingcurl/tls/sslkeylogfile.md#restrictions), [HTTP/3 backends](internals/backends.md#http-slash-3-backends)
  - brotli: [HTTP Compression](build/deps.md#http-compression), [Version](cmdline/curlver.md#version), [Which libcurl version runs](libcurl/api.md#which-libcurl-version-runs), [About content encodings](internals/content-encoding.md#about-content-encodings), [Conditional lines](internals/tests/file-format.md#conditional-lines)
 
@@ -412,7 +412,7 @@
  - Schannel: [TLS libraries](build/tls.md#tls-libraries), [Native CA stores](usingcurl/tls/verify.md#native-ca-stores), [HTTP/3 backends](internals/backends.md#http-slash-3-backends), [`<features>`](internals/tests/file-format.md#sect--less-than-features-greater-than)
  - Scheme: [Connect to port numbers](protocols/network.md#connect-to-port-numbers), [FILE](protocols/curl.md#file), [Naming](source/style.md#naming), [librtmp](build/deps.md#librtmp), [Scheme](cmdline/urls/scheme.md#scheme), [Name and password](cmdline/urls/auth.md#name-and-password), [TCP vs UDP](cmdline/urls/port.md#tcp-vs-udp), [Browsers](cmdline/urls/browsers.md#browsers), [Available exit codes](cmdline/exitcode.md#available-exit-codes), [Available --write-out variables](usingcurl/verbose/writeout.md#available---write-out-variables), [Proxy type](usingcurl/proxies/type.md#proxy-type), [SOCKS proxy](usingcurl/proxies/socks.md#socks-proxy), [Proxy authentication](usingcurl/proxies/auth.md#proxy-authentication), [TLS for emails](usingcurl/reademail.md#tls-for-emails), [Which libcurl version](libcurl/api.md#which-libcurl-version), [Proxy types](transfers/conn/proxies.md#proxy-types), [Available information](transfers/getinfo.md#available-information), [Authentication](libcurl-http/auth.md#authentication), [`CURLU_NON_SUPPORT_SCHEME`](helpers/url/parse.md#curlu_non_support_scheme), [`CURLU_DEFAULT_PORT`](helpers/url/get.md#curlu_default_port), [URLs](helpers/ws/urls.md#urls), [Get a response into memory](examples/getinmem.md#get-a-response-into-memory), [Protocol handler](internals/handler.md#protocol-handler), [Curl_handler](internals/structs.md#curl_handler)
  - SCP: [What protocols does curl support?](protocols/protocols.md#what-protocols-does-curl-support), [SCP](protocols/curl.md#scp), [SSH libraries](build/deps.md#ssh-libraries), [Supported schemes](cmdline/urls/scheme.md#supported-schemes), [Version](cmdline/curlver.md#version), [Available exit codes](cmdline/exitcode.md#available-exit-codes), [Protocols allowing upload](usingcurl/uploads.md#protocols-allowing-upload), [Compression](usingcurl/transfers/compression.md#compression), [URLs](usingcurl/ssh/url.md#urls), [Authentication](usingcurl/ssh/auth.md#authentication), [Known hosts](usingcurl/ssh/knownhosts.md#known-hosts), [All options](transfers/options/all.md#all-options), [Authentication](transfers/auth.md#authentication), [Curl_handler](internals/structs.md#curl_handler), [`<server>`](internals/tests/file-format.md#sect--less-than-server-greater-than)
- - security: [curl-announce](project/maillists.md#curl-announce), [Commercial support](project/support.md#commercial-support), [Security](project/security.md#security), [Trust](project/trust.md#trust), [Security](protocols/network.md#security), [How much do protocols change?](protocols/protocols.md#how-much-do-protocols-change), [FTPS](protocols/curl.md#ftps), [docs](source/layout.md#docs), [Reporting vulnerabilities](source/reportvuln.md#reporting-vulnerabilities), [`http_proxy` in lower case only](usingcurl/proxies/env.md#http_proxy-in-lower-case-only), [TLS](usingcurl/tls.md#tls), [Ciphers](usingcurl/tls/ciphers.md#ciphers), [Enable TLS](usingcurl/tls/enable.md#enable-tls), [TLS versions](usingcurl/tls/versions.md#tls-versions), [HTTP/0.9](http/versions/http09.md#http-slash-0-dot-9), [HSTS](http/https/hsts.md#hsts), [Protocol version](transfers/options/tls.md#protocol-version), [All options](transfers/options/all.md#all-options), [HSTS](transfers/callbacks/hsts.md#hsts), [Authentication](transfers/auth.md#authentication), [URLs](helpers/ws/urls.md#urls), [HSTS](internals/caches.md#hsts)
+ - security: [trurl, a URL tool](project/does.md#trurl-a-url-tool), [curl-announce](project/maillists.md#curl-announce), [Commercial support](project/support.md#commercial-support), [Security](project/security.md#security), [Trust](project/trust.md#trust), [Security](protocols/network.md#security), [How much do protocols change?](protocols/protocols.md#how-much-do-protocols-change), [FTPS](protocols/curl.md#ftps), [docs](source/layout.md#docs), [Reporting vulnerabilities](source/reportvuln.md#reporting-vulnerabilities), [`http_proxy` in lower case only](usingcurl/proxies/env.md#http_proxy-in-lower-case-only), [TLS](usingcurl/tls.md#tls), [Ciphers](usingcurl/tls/ciphers.md#ciphers), [Enable TLS](usingcurl/tls/enable.md#enable-tls), [TLS versions](usingcurl/tls/versions.md#tls-versions), [HTTP/0.9](http/versions/http09.md#http-slash-0-dot-9), [HSTS](http/https/hsts.md#hsts), [Protocol version](transfers/options/tls.md#protocol-version), [All options](transfers/options/all.md#all-options), [HSTS](transfers/callbacks/hsts.md#hsts), [Authentication](transfers/auth.md#authentication), [URLs](helpers/ws/urls.md#urls), [HSTS](internals/caches.md#hsts)
  - SFTP: [What protocols does curl support?](protocols/protocols.md#what-protocols-does-curl-support), [SFTP](protocols/curl.md#sftp), [SSH libraries](build/deps.md#ssh-libraries), [Supported schemes](cmdline/urls/scheme.md#supported-schemes), [Version](cmdline/curlver.md#version), [Available exit codes](cmdline/exitcode.md#available-exit-codes), [Trace options](usingcurl/verbose/trace.md#trace-options), [Protocols allowing upload](usingcurl/uploads.md#protocols-allowing-upload), [Compression](usingcurl/transfers/compression.md#compression), [URLs](usingcurl/ssh/url.md#urls), [Authentication](usingcurl/ssh/auth.md#authentication), [Known hosts](usingcurl/ssh/knownhosts.md#known-hosts), [All options](transfers/options/all.md#all-options), [Authentication](transfers/auth.md#authentication), [Curl_handler](internals/structs.md#curl_handler), [`<server>`](internals/tests/file-format.md#sect--less-than-server-greater-than), [Run a range of tests](internals/tests/run.md#run-a-range-of-tests)
  - --silent: [Progress meter](cmdline/progressmeter.md#progress-meter), [Error message](cmdline/exitcode.md#error-message)
  - SMTP: [What protocols does curl support?](protocols/protocols.md#what-protocols-does-curl-support), [SMTP](protocols/curl.md#smtp), [Without scheme](cmdline/urls/scheme.md#without-scheme), [Version](cmdline/curlver.md#version), [Available exit codes](cmdline/exitcode.md#available-exit-codes), [Protocols allowing upload](usingcurl/uploads.md#protocols-allowing-upload), [Enable TLS](usingcurl/tls/enable.md#enable-tls), [Sending email](usingcurl/smtp.md#sending-email), [STARTTLS](transfers/options/tls.md#starttls), [All options](transfers/options/all.md#all-options), [`CURLU_GUESS_SCHEME`](helpers/url/parse.md#curlu_guess_scheme), [Variables](internals/tests/file-format.md#variables), [Test servers](internals/tests/servers.md#test-servers)
@@ -451,7 +451,7 @@
  - --trace-ids: [Identify transfers and connections](usingcurl/verbose/trace.md#identify-transfers-and-connections)
  - --trace-time: [Time stamps](usingcurl/verbose/trace.md#time-stamps)
  - transfer-encoding: [Pass on transfer encoding](http/response.md#pass-on-transfer-encoding), [Chunked encoded POSTs](http/post/chunked.md#chunked-encoded-posts)
- - trurl: [trurl](cmdline/urls/trurl.md#trurl)
+ - trurl: [What does curl do?](project/does.md#what-does-curl-do), [trurl](cmdline/urls/trurl.md#trurl)
 
 ## U
 
@@ -459,7 +459,7 @@
  - -u: [Building libcurl on MSYS2](install/windows/win-msys2.md#building-libcurl-on-msys2), [Passwords](cmdline/passwords.md#passwords), [URLs](usingcurl/ssh/url.md#urls), [Authentication](usingcurl/ssh/auth.md#authentication), [IMAP](usingcurl/reademail.md#imap), [Authentication](http/auth.md#authentication)
  - Ubuntu: [Ubuntu and Debian](install/linux.md#ubuntu-and-debian)
  - URL Globbing: [URL globbing](cmdline/urls/globbing.md#url-globbing)
- - URL parser: [Browsers](cmdline/urls/browsers.md#browsers), [trurl](cmdline/urls/trurl.md#trurl), [`CURLU_ALLOW_SPACE`](helpers/url/parse.md#curlu_allow_space)
+ - URL parser: [trurl, a URL tool](project/does.md#trurl-a-url-tool), [Browsers](cmdline/urls/browsers.md#browsers), [trurl](cmdline/urls/trurl.md#trurl), [`CURLU_ALLOW_SPACE`](helpers/url/parse.md#curlu_allow_space)
  - --url-query: [Query](cmdline/urls/query.md#query)
 
 ## V
@@ -472,6 +472,7 @@
 
 ## W
 
+ - wcurl: [What does curl do?](project/does.md#what-does-curl-do)
  - Wireshark: [Available exit codes](cmdline/exitcode.md#available-exit-codes), [Trace options](usingcurl/verbose/trace.md#trace-options), [SSLKEYLOGFILE](usingcurl/tls/sslkeylogfile.md#sslkeylogfile), [Figure out what a browser sends](http/post/browsersends.md#figure-out-what-a-browser-sends)
  - wolfSSH: [SSH libraries](build/deps.md#ssh-libraries), [`<features>`](internals/tests/file-format.md#sect--less-than-features-greater-than)
  - wolfSSL: [Commercial support](project/support.md#commercial-support), [lib/vtls](source/layout.md#lib-slash-vtls), [TLS libraries](build/tls.md#tls-libraries), [Native CA stores](usingcurl/tls/verify.md#native-ca-stores), [Restrictions](usingcurl/tls/sslkeylogfile.md#restrictions), [All options](transfers/options/all.md#all-options), [SSL context](transfers/callbacks/sslcontext.md#ssl-context), [HTTP/3 backends](internals/backends.md#http-slash-3-backends), [`<features>`](internals/tests/file-format.md#sect--less-than-features-greater-than)