NY Times Crossword
James Tuttle
May 27, 2014

The words and phrases below have something in common. Can you determine what it is?

FLIP PHONE
SCHOOL WORK
BABY BLUE
BANKNOTE
OVERHAND
DOUBLE DATE

HINTS:
#1: For BANKNOTE and OVERHAND, think of each half as a separate clue.
#2: The same word can follow each clue.

Answer:

Each clue word can be followed by BOOK:

FLIP BOOK
PHONE BOOK
SCHOOL BOOK 
WORK BOOK, etc.