Are you a bookworm person?
Here, I have some tips for you to get free books that you want. 
Search in Google "b-ok.asia" then click the first result after that you can explore the website and search the title, author, publisher, ISBN, etc. And also, there are other options in searching to make it easier to find the book you want.

Description About Website
Z-Library is one of the largest online libraries in the world that contains over 5,330,000 books and 77,100,000 articles. We aim to make literature accessible to everyone.
Z-Library. Retreived from https://b-ok.asia/

For more questions, search on YouTube "Aces for Life - How to download any Book For FREE 2020 - The Z Library Project? || (pdf, epub, Kindle all formats)" to watch the full tutorial