Merge 9b5ad16aab into 2d1bd6bf03

* feat: added book

* fix: book name

* fix: trailing slash

* Update books/free-programming-books-subjects.md

Co-authored-by: Eric Hellman <eric@hellman.net>

---------

Co-authored-by: Eric Hellman <eric@hellman.net>

books/free-programming-books-subjects.md

@@ -868,6 +868,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Crypto 101 - Crypto for everyone](https://www.crypto101.io)
 * [Cryptography](https://en.wikibooks.org/wiki/Cryptography) - Wikibooks (HTML) *(:construction: in process)*
 * [CryptoParty Handbook](https://unglue.it/work/141611/)
+* [Fuzzing Book](https://www.fuzzingbook.org) - Andreas Zeller, Rahul Gopinath, Marcel Böhme, Gordon Fraser, Christian Holler (HTML)
 * [Gray Hat Hacking: The Ethical Hacker's Handbook](https://pages.cs.wisc.edu/~ace/media/gray-hat-hacking.pdf) - Allen Harper, Jonathan Ness, Chris Eagle, Shon Harris, Gideon Lenkey, Terron Williams (PDF)
 * [Handbook of Applied Cryptography](https://cacr.uwaterloo.ca/hac/index.html)
 * [How HTTPS works](https://howhttps.works) - dnsimple
@@ -945,6 +946,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Category Theory for Programmers](https://github.com/hmemcpy/milewski-ctfp-pdf) - Bartosz Milewski (PDF)
 * [Delftse Foundations of Computation](https://textbooks.open.tudelft.nl/textbooks/catalog/book/13) - Stefan Hugtenburgand, Neil Yorke-Smith @ TU Delft Open (PDF)
 * [Homotopy Type Theory: Univalent Foundations of Mathematics](https://homotopytypetheory.org/book/) (PDF)
+* [Introduction to Theoretical Computer Science](https://files.boazbarak.org/introtcs/lnotes_book.pdf) - Boaz Barak (PDF)
 * [Introduction to Theory of Computation](https://cglab.ca/~michiel/TheoryOfComputation/) - Anil Maheshwari, Michiel Smid (PDF)
 * [Models of Computation](https://cs.brown.edu/people/jes/book/) - John E. Savage
 * [Principles of Programming Languages](https://web.archive.org/web/20150418034451/http://www.cs.jhu.edu/~scott/pl/book/dist/) - Scott F. Smith *(:card_file_box: archived)*

more/problem-sets-competitive-programming.md

@@ -57,13 +57,18 @@
 ### Capture the flag
 
 * [ångstromCTF](https://angstromctf.com)
+* [Attack Defense](https://attackdefense.com) (email address *requested*)
+* [CryptoHack](https://cryptohack.org) (email address *requested*)
+* [Cmd Challenge](https://cmdchallenge.com)
 * [CTFlearn](https://ctflearn.com) (email address *requested*)
 * [CTFtime](https://ctftime.org)
 * [DamnVulnerableDefi](https://www.damnvulnerabledefi.xyz)
 * [echoCTF](https://echoctf.red) (email address *requested*)
+* [Exploit Education](https://exploit.education)
 * [Google CTF](https://capturetheflag.withgoogle.com) (email address *requested*)
 * [Hacker101](https://ctf.hacker101.com) (email address *requested*)
 * [Hackthebox](https://www.hackthebox.eu) (email address *requested*)
+* [Hacka Flag](https://hackaflag.com.br) (email address *requested*)
 * [HackThisSite](https://www.hackthissite.org) (email address *requested*)
 * [InCTF](https://inctf.in)
 * [Microcorruption](https://microcorruption.com/login)
@@ -71,8 +76,12 @@
 * [Picoctf](https://picoctf.org/resources.html) (email address *requested*)
 * [ringzer0ctf](https://ringzer0ctf.com/home) (email address *required*)
 * [ROP Wargame Repository](https://github.com/xelenonz/game)
+* [Root Me](https://www.root-me.org) (email address *required*)
 * [SmashTheStack](http://www.smashthestack.org/main.html#wargames)
 * [TryHackMe](https://tryhackme.com) (email address *requested*)
+* [Vulnhub](https://www.vulnhub.com)
+* [W3Challs](https://w3challs.com) (email address *requested*)
+* [Zenk Security](https://www.zenk-security.com) (email address *requested*)
 
 
 ### Data science