Olatunde Onakoya, a facebook friend of mine shared with me a site where you can download FREE ebooks WITHOUT any registration and I have decided to share it with you.
At BookBoon.com, you can download FREE Textbooks online without submitting any personal details. You do not even need to register before you can start downloading Free Textbooks from the site.
Bookboon's free online textbooks for students are focused and to the point. They are all written by highly respected professors from top universities in the world and cover topics such as economics, statistics, IT, engineering and natural science.
There is a "search box" on the site that makes searching for textbooks alot more easier. I used it to search for "Java" and was able to download some cool Java Ebooks from the site. When searching the site, just use keywords and not just search with a long senetence.
You will need "Adobe reader" to read the ebooks.
Feel free to check it out: www.bookboon.com