Ruth Rendell books in order
27 books in the catalogue, about 157 hours of reading in all; the shortest takes 3 hours and the longest 12 hours.
2 series and 14 standalone books in the catalogue.
Inspector Wexford
18 books A New Lease of Death length not known
Wolf to the Slaughter 4.0 h 
The Best Man to Die 3.6 h A Guilty Thing Surprised length not known
No More Dying Then 4.0 h 
A Sleeping Life 3.7 h Put on By Cunning length not known
The Speaker of Mandarin length not known
An Unkindness of Ravens length not known
The Veiled One 5.2 h 
Simisola 6.7 h 
Road Rage 7.0 h 
Harm Done 8.1 h 
The Babes in the Wood 6.0 h 
End in Tears 6.2 h Not in the Flesh length not known
The Monster in the Box length not known
The Vault length not known
Inspector Wexford
4 books
From Doon with Death 3.5 h 
Murder Being Once Done 3.6 h Some Lie and Some Die length not known
9 
Shake Hands Forever 4.0 h Standalone books
Vanity Dies Hard 3.4 h 
A New Lease of Death 4.6 h 
A Judgement in Stone 3.5 h 
A Dark-adapted Eye 5.6 h 
Country House Murders 6.8 h 
The Bridesmaid 5.5 h 
Ruth Rendell Mysteries 12.3 h 
I Shudder at Your Touch 7.5 h 
Mystery Cats 4.7 h 
Asta's Book 8.4 h 
The Keys to the Street 7.0 h 
Mysterious Erotic Tales 4.5 h 
Sight for Sore Eyes, A 7.1 h 
The 50 Greatest Mysteries of All Time 10.4 h