Conjugal Rites by Paul Mars
The 3rd Brenda & Effie mystery after 'Never the Bride' and 'Something Borrowed'.
Brenda's 'husband' is tracking her down. They were made for each other so he is determined that they be together. Meanwhile the vile Mrs Claus is up to something nasty in various dimensions and a handful of Whitby inhabitants end up making a daytrip to Hell. This is a good read that continues the merry adventures of Brenda and Effie and their various friends and enemies and sets up new adventures to come.