if you need a mql programing book, you simply check the metaquotes website, you will find a large knowledge about mql and how to creat your own EA, no need to buy anything or download any other book if you know this one, it's a complete mql4 course, you can check the link below and see yourself.

https://book.mql4.com/
You can also search a large number of knowledge about MQL ,i also found the book "MQL for trader" .You can just click and download the book you can also this visit :
https://book.mql4.com/