Meg Cabot books in order
58 books in the catalogue, about 326 hours of reading in all; the shortest takes 55 minutes and the longest 10 hours.
2 series and 45 standalone books in the catalogue.
The Princess Diaries
16 books
The Princess Diaries 4.5 h The Princess Diaries, Volume II: Princess in the Spotlight length not known
3 
The Princess Diaries, Volume III: Princess in Love 5.3 h 4 
The Princess Diaries, Volume IV: Princess in Waiting 4.4 h 
The Princess Diaries, Volume IV and 1/2: Project Princess 55 min 6 
The Princess Diaries, Volume V: Princess in Pink 4.7 h The Princess Diaries, Volume VI and 1/2: The Princess Present length not known
The Princess Diaries, Volume VI: Princess in Training 4.9 h 
The Princess Diaries, Volume VII and 1/2: Sweet Sixteen Princess 1.5 h 9 
The Princess Diaries, Volume VII 5.6 h 
The Princess Diaries, Volume VII and 3/4: Valentine Princess 1.6 h 
The Princess Diaries, Volume VII: Party Princess 5.9 h 12 
The Princess Diaries, Volume VIII: Princess on the Brink 5.0 h The Princess Diaries, Volume IX: Princess Mia length not known
The Princess Diaries, Volume X: Forever Princess 9.9 h The Princess Diaries, Volume XI: Royal Wedding length not known
The Mediator
7 books
Shadowland 4.7 h 
Darkest Hour 5.8 h Ninth Key length not known
Reunion length not known
Haunted 4.7 h Twilight length not known
Remembrance length not known
Standalone books
Ransom My Heart 7.3 h 
A Season in the Highlands 9.9 h 
Princess Diaries Collection 5.1 h 
Educating Caroline 8.1 h 
Princess in the Spotlight 4.5 h 
The Mediator (8 editions) 5.3 h 
All-American Girl (2 editions) 5.3 h 
Kiss the Bride 6.3 h 
Nicola and the Viscount 4.8 h 
The Boy Next Door 7.1 h 
1-800-Where-R-You (4 editions) 4.7 h 
13 5.1 h 
Victoria and the Rogue 4.4 h 
Every Boy's Got One 6.0 h 
Girls' Night In 6.2 h 
Mia Tells It Like It Is 8.0 h 
Shadowland 5.3 h 
Teen Idol 5.3 h 
The Princess Present 1.6 h 
Twilight 5.1 h 
Avalon High (2 editions) 6.5 h 
Holiday Princess 2.5 h 
Size 12 Is Not Fat 6.8 h 
How to Be Popular 5.6 h 
Queen of Babble 5.3 h 
Size 14 Is Not Fat Either 6.6 h 
Big Boned 7.0 h 
Everything I Needed to Know About Being a Girl I Learned from Judy Blume 5.3 h 
Jinx 4.8 h 
Pants on Fire 4.9 h 
Princess Mia 5.6 h 
Prom Nights from Hell 5.6 h 
(Airhead #1) 6.5 h 
Insatiable 8.3 h 
Runaway 5.7 h 
Zombies Vs. Unicorns 7.9 h 
Abandon 5.6 h 
Size 12 And Ready To Rock 7.0 h 
Underworld 5.9 h 
Awaken 6.4 h 
From the Notebooks of a Middle School Princess 3.3 h 
Royal Wedding 8.0 h 
Remembrance 7.1 h 
Royal Wedding Disaster 5.2 h 
Star Wars - From a Certain Point of View 9.1 h