Amazon have a first in series sale on:
https://www.amazon.co.uk/s/ref=s9_ac...d_i=5400977031
Of interest are:
Ngiao Marsh: A Man Lay Dead (Inspector Allyne) at 99p
https://www.amazon.co.uk/Man-Dead-Ng...448396&sr=1-82
Christopher Fowler: Full Dark House (Bryant & May) at 99p
https://www.amazon.co.uk/Full-Dark-H...474065&sr=1-37
Colin Dexter: Last Bus to Woodstock (Inspector Morse) at £1.19
https://www.amazon.co.uk/Last-Woodst...474045&sr=1-31
Ken Follett: The Pillars of the Earth at 99p
https://www.amazon.co.uk/Pillars-Ear...6474019&sr=1-2
Robert Harris: Imperium (Cicero) at £1.99 (
Repeat)
https://www.amazon.co.uk/Imperium-Ci...6474019&sr=1-6
Andrea Camilleri: The Shape of Water (Inspector Montalban) at 99p (Repeat)
https://www.amazon.co.uk/Shape-Water...474401&sr=1-26