This book is written in Bengali. Personally I would recommend you to learn from an English E-book.
But, the hard effort of the publisher Oshim Kumar Paul needs to be thanked.
We are grateful to him for his generous help to the Bangla Community.
Download Link:
http://www.mediafire.com/download/a5inrkc7hjod5h7/CSS_TUTOHOST_E-BOOK.pdf