Yes, POCKETBOOK is a Scrabble word!

Letter values in Scrabble US: P 3, O 1, C 3, K 5, E 1, T 1, B 3, O 1, O 1, K 5.

Is it a valid word?

POCKETBOOK is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

your personal financial means
a pocket-size case for holding papers and paper money
pocket-sized paperback book
a container used for carrying money and small personal items or accessories (especially by women)

Also: pocket book, pocket edition.