From Wikipedia:

   Marion Gibbons (née Chesney; 10 June 1936 -30 December 2019) was a Scottish writer of romance and mystery novels since 1979. She wrote numerous successful historical romance novels under a form of her maiden name, Marion Chesney, including the Travelling Matchmaker and Daughters of Mannerling series.

   Using the pseudonym M. C. Beaton, she also wrote many popular mystery novels, most notably the Agatha Raisin and Hamish Macbeth mystery series. Both of these book series have been adapted for TV. She also wrote romance novels under the pseudonyms Ann Fairfax, Jennie Tremaine, Helen Crampton, Charlotte Ward, and Sarah Chester.

   In addition to the books below (courtesy of the Fantastic Fiction website), many of her romance novels may have considerable mystery content:


       The Hamish Macbeth Mysteries —

1. Death of a Gossip (1985)

2. Death of a Cad (1987)
3. Death of an Outsider (1988)
4. Death of a Perfect Wife (1989)
5. Death of a Hussy (1990)
6. Death of a Snob (1991)
7. Death of a Prankster (1992)
8. Death of a Glutton (1993)
aka Death of a Greedy Woman
9. Death of a Travelling Man (1993)

10. Death of a Charming Man (1994)
11. Death of a Nag (1995)
12. Death of a Macho Man (1995)
13. Death of a Dentist (1997)
14. Death of a Scriptwriter (1998)
15. Death of an Addict (1999)
15.5. A Highland Christmas (1999)
16. Death of a Dustman (2001)
17. Death of a Celebrity (2001)
18. Death of a Village (2001)
19. Death of a Poison Pen (2004)

20. Death of a Bore (2005)
21. Death of a Dreamer (2006)
22. Death of a Maid (2007)
23. Death of a Gentle Lady (2008)
24. Death of a Witch (2009)
25. Death of a Valentine (2009)
26. Death of a Chimney Sweep (2011)
aka Death of a Sweep
27. Death of a Kingfisher (2012)
28. Death of Yesterday (2013)
29. Death of a Policeman (2012)
30. Death of a Liar (2015)
30.5. Knock, Knock, You’re Dead! (2016)
31. Death of a Nurse (2016)
32. Death of a Ghost (2017)
33. Death of an Honest Man (2018)
34. Death of a Love (2020)


       The Agatha Raisin Mysteries —

1. The Quiche of Death (1992)

2. The Vicious Vet (1993)
3. The Potted Gardener (1994)
4. The Walkers of Dembley (1995)
5. The Murderous Marriage (1996)
6. The Terrible Tourist (1997)
7. The Wellspring of Death (1998)
8. The Wizard of Evesham (1999)
9. The Witch of Wyckhadden (1999)
10. The Fairies of Fryfam (2000)
11. The Love from Hell (2001)

12. The Day the Floods Came (2001)
13. The Case of the Curious Curate (2001)
14. The Haunted House (2003)
15. The Deadly Dance (2004)
16. The Perfect Paragon (2005)
17. Love, Lies and Liquor (2006)
18. Kissing Christmas Goodbye (2007)
19. Agatha Raisin and a Spoonful of Poison (2006)
20. There Goes The Bride (2009)
21. Busy Body (2010)

22. As the Pig Turns (2011)
23. Hiss and Hers (2012)
24. Something Borrowed, Someone Dead (2013)
25. The Blood of an Englishman (2014)
26. Dishing the Dirt (2015)
27. Pushing up Daisies (2016)
28. The Witches’ Tree (2017)
29. The Dead Ringer (2018)
30. Beating About the Bush (2019)
31. Hot to Trot (2020)

   Novellas —

Agatha Raisin and the Christmas Crumble (2012)
Hell’s Bells (2013)
Agatha’s First Case (2015)


       The Edwardian Murder Mysteries —

1. Snobbery with Violence (2003)

2. Hasty Death (2004)
3. Sick of Shadows (2005)
4. Our Lady of Pain (2006