open book

9 LETTERS · STARTS WITH O

open book is a valid 9-letter word worth 16 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
O1P3E1N1B3O1O1K5
1 + 3 + 1 + 1 + 0 + 3 + 1 + 1 + 5 =16 PTS
DOUBLE WORD → 32TRIPLE WORD → 48
MEANING

What does open book mean?

1