Yes, PLAYBOOKS is a Scrabble word!

Letter values in Scrabble US: P 3, L 1, A 1, Y 4, B 3, O 1, O 1, K 5, S 1.

Is it a valid word?

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

a notebook containing descriptions and diagrams of the plays that a team has practiced (especially an American football team)
a book containing the scripts of one or more dramatic plays
a scheme or set of strategies for conducting a business campaign or a political campaign