I have a pretty long list and it would have been even longer if sufue's post hadn't covered a large part of it.
The Tessa Crichton series by Anne Morice
The Neil Kelly series by S F X Dean
The Colonel Primrose series by Leslie Ford
The Marian Larch series and the Nightingale series by Barbara Paul
The Cassie Swann series by Susan Moody
Most of Marian Babson
Most of Angela Thirkell
I did have Cyril Hare on my list but when Korta posted that 50% Kobo discount for Canada yesterday I took a short trip over the border and there they almost all were – with very low prices and DRM-free too.
I’m mainly left with gaps in otherwise available series –
Lay On, Mac Duff! By Charlotte Armstrong
A Ring of Roses by Christianna Brand
Thinner Than Water, Death of a Minor Character, Woman Slaughter, Sleep of the Unjust , Something Wicked, Root of All Evil, and Smoke Without Fire by Elizabeth Ferrars
Rich, Radiant Slaughter by Orania Papazoglou (Jane Haddam)
Death of My Aunt, Death of His Uncle, and The Cornish Fox by C. H. B. Kitchin
Mrs Malory and the Only Good Lawyer, Mrs Malory: Death Among Friends, Mrs Malory and the Fatal Legacy, Mrs Malory and the Lilies That Fester, Mrs Malory and Death by Water, and Mrs Malory and the Delay of Execution by Hazel Holt
Up and Down and Over and Under by Mat Coward
Death is No Sportsman by Cyril Hare
Murder Machree by Eleanor Boylan
Malice Downstream by Graham Thomas
The past few years have been amazing though; I’ve already amassed more than I’ll be able to read in my lifetime.