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