Books like 21St Birthday
James Patterson, Maxine Paetro
21St Birthday is 416 pages, about 7 hours 38 minutes at 250 words a minute.
12 books to read next
How long each takes
Vendetta in Death 7.6 h 
The Surgeon 6.8 h 
Shadows in Death 6.8 h 
Indulgence in Death. by J.D. Robb 7.0 h 
Golden in Death 7.3 h 
Murder Is Easy 4.1 h 
Portrait in Death 6.5 h 
Conspiracy in Death 7.0 h 
Reunion in Death 6.9 h 
Rapture in Death 5.9 h 
Holiday in Death 6.3 h 
Devoted in Death 8.2 h Bar height shows length. Estimated at 250 words a minute.