Lynsay Sands books in order
53 books in the catalogue, about 360 hours of reading in all; the shortest takes 6 hours and the longest 8 hours.
5 series and 29 standalone books in the catalogue.
The Deed
3 books
Devil of the Highlands
3 books
Highland Brides
12 books
An English Bride in Scotland 7.0 h 
To Marry a Scottish Laird 7.6 h The Highlander Takes a Bride length not known
Falling for the Highlander length not known
Surrender to the Highlander 7.0 h The Highlander's Promise length not known
The Wrong Highlander length not known
Hunting for a Highlander length not known
Highland Treasure 6.2 h Highland Wolf length not known
In Her Highlander's Bed length not known
he Highlander's Return length not known
Rogue Hunter
3 books
Madison Sisters
3 books
Standalone books
The Switch 6.8 h 
Always 6.7 h 
Sweet Revenge 7.1 h 
Bliss 8.4 h 
Born to Bite 6.8 h 
Runaway Vampire 6.6 h 
Tall, Dark & Hungry 6.6 h 
The Reluctant Vampire 6.6 h 
Under a Vampire Moon 7.1 h 
Single White Vampire 6.8 h 
Love Bites 6.5 h 
A Quick Bite 7.2 h 
The Perfect Wife 6.5 h 
A Bite to Remember 7.0 h 
Love Is Blind 7.0 h 
Bite Me If You Can 6.9 h 
The Accidental Vampire 7.0 h 
The Brat 7.0 h 
Eternal Lover 7.3 h 
Vampire, Interrupted 6.8 h 
Vampires Are Forever 7.0 h 
Hungry for You 6.9 h 
The Lady Is a Vamp 6.4 h 
Immortal Ever After 7.1 h 
One Lucky Vampire 7.0 h 
Vampire Most Wanted 6.9 h 
About A Vampire 7.1 h 
Meant to Be Immortal 7.3 h 
Immortal Rising 6.7 h Collected editions
Volumes that gather several of the books above.
I Will / Puddings, Pastries, and Thou / Union / All I Want 7.3 h 
The Yearning / Bitten / Stranger In The Night / The Awakening 5.9 h 
Nightriders / The Highland Bride 5.9 h 
The Hunt / The Rescue 5.7 h 
Undead in the Garden of Good and Evil / The Claire Switch Project / Chaotic / Dead Man Dating 7.4 h 
Blood Feud / The Capture 5.7 h 
I Will / Three French Hens / Father Christmas 5.6 h 
Vampire Valentine / Hearts Untamed / Kiss and Kill Cupid 6.8 h 
The Gift / Home for the Holidays 5.9 h