Codeigniter 2.0 books exist?

[eluser]Unknown[/eluser]
I have reviewed in Google and Amazon about Codeigniter 2.0 books, and seems that does not exist (the book Practical CodeIgniter 2 Projects: seems was not published). Please give me some guidance about options for Codeigniter 2.0 books, I am interested in read a paper book about Codeigniter 2.0 framework.

thanks in advance.