Books like Counting by Sevens
Holly Goldberg Sloan
Counting by Sevens is 380 pages, about 6 hours 58 minutes at 250 words a minute.
12 books to read next
How long each takes
Double Love 3.3 h 
Tears of a Tiger 3.3 h 
Diary of a Wimpy Kid 4.1 h 
Secrets 2.2 h 
Harry Potter and the Chamber of Secrets 6.3 h 
Eighth Grade Bites 3.4 h 
How to Be Popular 5.6 h 
Snitch 5.7 h 
Mrs. Spitzer's Garden 35 min 
The Battle of Jericho 5.5 h 
Princess Mia 5.6 h 
It Had to Be You 6.2 h Bar height shows length. Estimated at 250 words a minute.