Lisi Harrison books in order
19 books in the catalogue, about 77 hours of reading in all; the shortest takes 1 hour and the longest 6 hours.
3 series and 16 standalone books in the catalogue.
Monster High
5 books
Monster High 5.6 h The Ghoul Next Door length not known
Where There's a Wolf, There's a Way length not known
Back and Deader Than Ever length not known
Drop Dead Diary length not known
Alphas
4 books Alphas length not known
Movers & Fakers 4.2 h Belle of the Brawl length not known
Top of the Feud Chain length not known
Girl Stuff
3 books
Standalone books
Best Friends for Never 3.6 h 
Sealed with a Diss 4.6 h 
The Clique (2 editions) 4.0 h 
Invasion of the Boy Snatchers 4.6 h 
Revenge of the Wannabes 5.4 h 
Dial L for Loser 4.9 h 
The Pretty Committee Strikes Back 4.9 h 
It's Not Easy Being Mean 3.5 h 
Bratfest at Tiffany's 4.2 h 
P.S. I Loathe You 3.8 h 
The Clique Summer Collection 2.3 h 
Charmed and Dangerous 3.5 h 
These Boots Are Made for Stalking 4.2 h 
A Tale of Two Pretties 3.7 h 
Monster High 3 4.4 h 
Monster High Fearbook 1.1 h