What is the best book for learning the Blumenfeld Gambit?

I would like to study the Blumenfeld gambit (more deeply than just watching youtube videos). Does anyone have any good suggestions for books on this line?

https://www.amazon.com/Attack-Black-Valery-Aveskulov/dp/1906454396

https://www.amazon.com/Blumenfeld-Gambit-Cadogan-Chess-Books/dp/0080371337

I second Rivertonknight's attack with black suggestion

great thank you. Have either of you actually studied these books? and have you had any success with the blumenfeld after doing so? I have played the Benko for years, but am growing weary of it, and looking for something more dynamic...

Benko is dynamic....

Blumenfeld is very well treated in Aveskulov book (awesome book for benko players).

The only issue with Aveskulov's book, it forgets the famous a4 variation, quite a problem...

Perunovic book on Benko should give u the modern ideas with Qa5 (to avoid this a4 line for example).