Hannah Howell books in order
48 books in the catalogue, about 309 hours of reading in all; the shortest takes 5 hours and the longest 8 hours.
4 series and 37 standalone books in the catalogue.
Murray/Camerons
3 books
Murray/MacEnroys
2 books
Wherlocke
7 books
If He's Wicked 6.9 h If He's Sinful length not known
If He's Wild length not known
If He's Dangerous length not known
If He's Tempted length not known
If He's Daring length not known
If He's Noble length not known
Highland Brides
3 books
Standalone books
Amber Flame 6.7 h 
Beauty and the Beast 7.0 h 
Highland Hearts 6.4 h 
Silver Flame (2 editions) 6.9 h 
Kentucky Bride 6.9 h 
Only for You 7.0 h 
Unconquered 6.4 h 
A Taste Of Fire 7.2 h 
Wild Roses 6.0 h 
Highland Destiny 5.9 h 
A Stockingful of Joy 5.9 h 
Highland Honor 5.9 h 
Highland Vow 6.4 h 
Highland Knight 7.0 h 
Highland Bride 6.4 h 
Highland Angel 5.9 h 
Highland Vampire 5.9 h 
Conqueror's Kiss 7.5 h 
Highland Barbarian 6.4 h 
Highland Savage (2 editions) 5.6 h 
Highland Wedding 6.1 h 
Eternal Lover 7.3 h 
Highland Fire 7.0 h 
Highland Sinner 7.0 h 
Highland Wolf 6.4 h 
Nature of the Beast 6.0 h 
Highland Beast 4.8 h 
My Lady Captor 6.9 h 
Wild Conquest 6.3 h 
Compromised Hearts 8.1 h 
Highland Hunger 5.6 h 
Highland Protector 6.5 h 
If He's Wild By Hannah Howell 6.5 h 
Yours for Eternity 6.3 h 
Highland Hero 7.2 h 
Highland Master 6.4 h 
Highland Promise 6.5 h Collected editions
Volumes that gather several of the books above.
