Free ebooks for learning optimization techniques on programming?

Question

Can anyone help me to provide such e books, so I can learn efficient methods and build an optimised program. .

Answer 1

Ultimate Pdf collection for learn programming
java
http://index-of.es/Java/
android
http://index-of.es/Android/
c++
http://index-of.es/C++/
css
http://index-of.es/CSS/
html
http://index-of.es/HTML/
JavaScript
http://index-of.es/JS/
python
http://index-of.es/Python/
php
http://index-of.es/PHP/
perl
http://index-of.es/Perl/
ruby
http://index-of.es/Ruby/
c
http://index-of.es/Programming/C/
for more
http://index-of.es/Programming/
main root is http://index-of.es
thanks
next list coming soon

Answer 2

I need a ebooks with programming examples in it, in which efficient and optimized code r there. .

Answer 3

Not working

Answer 4

Take a look at these: https://github.com/EbookFoundation/free-programming-books/blob/master/free-programming-books.md