What level are you? The Betty Azar books are good grammar texts, there are three for the various levels. Also if you want a book that includes conversation, reading, grammar etc, I really liked the Smart Choice books and the English KnowHow. For only conversation, Let's Talk was interesting.

Actually I'm reading a book of the BBC, "calling all beginners" by David Hicks. It has a lot of themes for different levels and multiples examples that helps awfully. I've got a Spanish version, but may be you can get it in another language.

EN Textbook is not good for Learning EN...So...