A whole lotta books
P.S. Please be sure to buy a physical book from the authors when you get done using a book and get a job. Or just send them a donation when you get enough money.
Here's some more links to repos with roadmaps and books:
https://github.com/JonDevOps/computer-science
https://github.com/JonDevOps/Awesome-Hacking
https://github.com/JonDevOps/free-programming-books
https://github.com/JonDevOps/Free-Security-eBooks
https://github.com/JonDevOps/IT-Books
https://github.com/JonDevOps/developer-roadmap