There are web sites that let you read computer books online or download a pdf copy of the book. Be careful with this.
Here is another site:
The following site has e-books on a variety of topics.
The following site requires you to become a member. It is free. Then you can download the books for free.
https://mva.microsoft.com/ebooks
GoalKicker.com has some free booklets on programming topics that you can download as a free PDF. They are called “Notes for Professionals”.
Best Books
How do you pick the best book? One way is to go to Amazon and check out the ratings and the comments. Another way is to go to Book Authority for non-fiction books.