American Sign Language,
This review is from: How To SIgn Language Volume 1 - Family & Places (Kindle Edition)
This book relates to American Sign Language, not British Sign Language, so probably not useful to most people in the UK.
Anyway, sign language is generally better learnt from watching a person demonstrate the sign so you can see the movement, facial expression and body language which form part of the sign. Books are ok for revision of a sign you already know, but not really for learning. If you can't get to a class to learn, try videos rather than books.
Having said that, if you actually want a book to help you remember American signs that you have already learnt, then the signs in this one are fairly clearly illustrated and explained, so you could do a lot worse!