Ten Books...by husbands and wives

All but one of the ten featured books have been written under a nom de plume, with a husband and wife writing team behind it. These couples are not  writing romance though,   more often they are collaborating on crime and mystery ....

Mia James is the pen name of Tasmina Perry and John Perry, writing a young adult paranormal mystery series,  the Ravenwood mysteries.  Darkness falls is set in London,  in Highgate, featuring vampires and murder....

There is no non de plume for this Scandanavian husband and wife team Maj Sjöwall and Per Wahlöö,   who have collaborated on ten mysteries featuring Detective Inspector Martin Beck. Roseanna is the first in this masterful series of ten novels, collectively titled "The story of a crime."

Written by well known crime writing duo,  Nicci Gerard and Sean French, who use the slogan- 'one writer, two minds'. Their current project is a new series of books  featuring psychotherapist Frieda Klein.
Blue Monday. A day for murder is the first book in the new series.

Jan Coffey is the pseudonym of married couple James A McGoldrick and Nikoo K. Coffey McGoldrick. Fourth Victim combines a heartwarming romance with a tense, edgy, wholly convincing suspense,  creating a great romantic suspense story. 

Lars Kepler is actually a  Swedish marriedcouple, Alexander Ahndoril and Alexandra Coelho Ahndoril. Their book, The hypnotist, was longlisted for the International IMPAC Dublin Literary Award, 2013. 
Read the number one Scandanavian crime bestseller taking the world by storm.
Karolinska Hospital,Stockholm.  Detective Inspector Joona Linna is face with a boy who has witnessed the gruesome murder of his family.He's suffered more than one hundred knife wounds and is comatose with shock.

Cleo Coyle, Cozy mysteries are written by Alice Alfonsi and husband Mark Cerasini. 
A brew to Kill A shocking hit and run in front of her Village Blend coffeehouse spurs Clare Cosi into action. A divorced, single mom in her forties, Clare is also a dedicated sleuth, and she is determined to track down this ruthless driver who ran down an innocent friend and customer.

Simon Beaufort is the pseudonym of Susanna Gregory and Beau Riffenburgh when they write together. The Bishops brood  is a Sir Geoffrey Mappestone mystery. 
When the treacherous Bishop of Durham escapes from the Tower of London, Geoffrey and his frined Roger-who is the Bishop's son-must travel north in search of a killer who threatens the stability of the entire country. 

Barbara Allan-is the joint pseudonynm of acclaimed short story writer Barbara Collins and New York Times bestselling author Max Allan Collins. They write the Trash and treasure mysteries.
  Antiques knock off is a laugh out loud cozy mystery. Brandy Borne is pretty sure her charmingly eccentric(aka off the meds)mother, Vivian, did not kill that viperous mousy haired busybody Connie Grimes. But there's the small matter of her guilty plea...

Alex Rutherford is the pen name of Dianna and Michael Preston, who write a series historical sagas, Empire of the Moghul. Book one is Raiders from the north. This series covers the rise and height of the Moghul Empire in early modern India. 

Michael Gregorio, consisting of Daniela De Gregorio and Michael G. Jacob, are crime writers. Critique of criminal reason  is the first in a series of books set in East Prussia in the height of the Napoleonic Wars. It chronicles the attempts of magistrate Hanno Stiffeniis to solve a murder mystery.