Thank you for the new thread southeast!
My list:
1: EC Bateman - Death at the Auction
2: Sophie Irwin - A Lady's Guide to Fortune-Hunting
3: Deanna Raybourn - Night of a Thousand Stars
4: Lynn Messina - A Brazen Curiosity
5: Lynn Messina - A Scandalous Deception
6: Lynn Messina - An Infamous Betrayal
7: Lynn Messina - A Nefarious Engagement
8: Richard Armitage - Geneva (audiobook)
9: Hazel Holt - Death of a Dean
10: Richard Osman - The Bullet That Missed
11: Anthony Horowitz - Stormbreaker
12: Rosie Talbot - Sixteen Souls
13: Jonathan Stroud - The Notorious Scarlett & Browne
14: Rory Clements - Corpus
15: Rory Clements - Nucleus
16: Sophie Hannah - Closed Casket
17: Karen M McManus - Nothing More to Tell
18: M C Beaton - Devil's Delight
19: Alexandra Benedict - Murder on the Christmas Express
20: M A Bennett - S.T.A.G.S.
21: M A Bennett - D.O.G.S.
22: M A Bennett - F.O.X.E.S.
23: M A Bennett - T.I.G.E.R.S.
24: M A Bennett - H.A.W.K.S.
25: Sophie Hannah - The Monogram Murders
26: Sophie Hannah - The Mystery of Three Quarters
27: Joanna Lowell - Artfully Yours
28: Joanna Lowell - The Runaway Duchess
29: Caroline O'Donoghue - All Our Hidden Gifts
30: Caroline O'Donoghue - The Gifts That Bind Us
31: Emily Brightwell - Mrs Jeffries weeds the plot
32: Rhys Bowen - The Last Mrs Summers
33: Rhys Bowen - God Rest Ye, Royal Gentlemen
34: Rhys Bowen - Four funerals & maybe a wedding
35: Michelle Salter - Death at Crookham Hall
36: Deanna Raybourn - Killers of a Certain Age
37: Lesley Cookman - Murder on the Run
38: Lesley Cookman - Murder at Mallowan Manor
39: Scott Allan - Do the Hard Things First
40: Helena Dixon - Murder at the Country Club
41: Helena Dixon - Murder on Board
42: Helena Dixon - Murder at the Charity Ball
43: Beverley Watts - Grace
44: Beverley Watts - Temperance
45: Beverley Watts - Faith
46: Rachel McLean - The Blue Pool Murders
47: Lynn Messina - A Treacherous Performance
48: Lynn Messina - A Sinister Establishment
49: Maureen Johnson - The Box in the Woods
50. Robert Muchamore - The Recruit
51. Hazel Holt - Murder on Campus
52. Lesley Cookman - Murder at the Manor
53. Jodi Taylor - About Time
54. Linda Davidsson - The Ikigai Book
55. JM Hall - A Pen Dipped in Poison
56. Hannah Dolby - No Life for a Lady
57. Hannah Beckerman - The Forgetting
58. Rachel McLean - The Lochside Murder
59. Rachel McLean - The Lighthouse Murder
60. Helena Dixon - Murder at the Beauty Pageant
61. John Marrs - The Good Samaritan
62. Lesley Cookman - Murder out of Tune
63. Enid Blyton - The Enchanted Wood
64. Enid Blyton - The Magic Faraway Tree
65. Enid Blyton - The Folk of the Faraway Tree
66. Enid Blyton - The Adventures of the Wishing Chair
67. Enid Blyton - The Wishing Chair again
68. JM Hall - A Spoonful of Murder (audiobook)
69. Maureen Johnson - Nine Liars
70. Tracy Whitwell - The Accidental Medium
71. Caroline O'Donoghue - Every Gift a Curse
72. Charlotte Leonard - Afterwards
73. Shalini Boland - The Silent Bride
74. CK McDonnell - Love Will Tear Us Apart
75. SG MacLean - Seeker
76. Various authors - Marple
77. Mary Stewart - Madam, Will You Talk?
78. Terry Pratchett - Guards! Guards!
79. Charlotte Plain - Happy planning - plan your way through anything
80. Ashley Poston - The Dead Romantics
81. Jodi Taylor - Saving Time
82. Hazel Holt - The Cruellest Month
83. MRC Kasasian - The Horror of Haglin House
84. Tracy Rees - The Elopement
85. Alison Uttley - A Traveller in Time
- Ruth Ware - The Death of Mrs Westaway
Orphan Harriet unexpectedly comes into a large inheritance - she knows it can't be hers as she has no family but claims it anyway, given her dire financial circumstances. Entertaining but really dragged out the conclusion, which even I saw coming!
- Georgette Heyer - The Black Moth
Her first novel I think? Love of a good woman reforms a highwayman - I liked this although was slightly hazy on why exactly the highwayman had found it necessary to become one in the first place...
- Grace Friedman & Sarah Cheyette - Winning with ADHD
DTS1 has a lot of ADHD tendencies - I'm trying to get ahead of the game by learning about teenagers and young people with ADHD and strategies which can help!
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MC Beaton - Agatha Raisin & the Deadly Dance (audiobook)
Ah, I love an Agatha Raisin audiobook, soothingly and excellently read by Penelope Keith. If only I sounded like Penelope Keith but am more like Keith Lemon - anyhow, one of the better early Agatha Raisin stories, and doesn't require much concentration to follow which suits me nowadays.
- Jodi Taylor - The Good, The Bad & The History
The latest St Marys novel - I'm not sure if there will be any more as we seem to have reached full circle between this and the Time Police series (I think @MamaNewtNewt felt the same?) but TBH I enjoy the Time Police more nowadays as I find the St Marys plots so convoluted
still, very entertaining, well worth a read.
- Heather Fawcett - Emily Wilde's Encyclopedia of Faeries
I think much reviewed on here already... I enjoyed this a lot except frankly <BUGBEAR ALERT> if you are American/ Canadian and writing as an English person then do get someone English to check it over and make sure you haven't left any jarring words or phrases in there...
- Enid Blyton - More Wishing Chair Stories
Read with DTS1 - he loves these far more than I expected!
- SG MacLean - Destroying Angel
- SG MacLean - The Bear Pit
The third and fourth books in the Seeker series - like Shardlake but with more action! - I raced through these and am waiting for the last from the library. Set during the Commonwealth, which isn't a period I know a lot about despite having a History degree 
- Cynthia Murphy - The Last to Die
YA horror - think along the lines of Point Horror - a quick read.
- Jonathan Stroud - The Screaming Staircase
- Jonathan Stroud - The Whispering Skull
- Jonathan Stroud - The Hollow Boy
- Jonathan Stroud - The Creeping Shadow
- Jonathan Stroud - The Empty Grave
Gosh I love the Lockwood books, despite being a lot slightly older than the target YA audience. Still sad that the series has been cancelled by Netflix too! Just excellent books, great premise, lots of humour and scary in places.
DNF: Janice Hallett - The Mysterious Case of the Alperton Angels
Thought I'd really enjoy this, as I enjoyed The Appeal - didn't, couldn't get into it at all. Bah. I did find The Twyford Code absolute twaddle (though readable twaddle, to be fair) so perhaps should have expected it.
@FortunaMajor I liked the tripfiction site although my town has a very famous book set there and it wasn't included, so I'm not sure of their criteria!
I remember thinking the Kate Mosse books were great @TimeforaGandT but am not sure I'd have the time/ patience for them now, as my brain has been fried by small DC and the perimenopause 
In sadder news, my BorrowBox app seems to have given up?! It won't work at all with my Kindle Fire, the Kindle keeps saying that the app is outdated - I'm waiting to hear back from BorrowBox about what I can do! In the meantime I've paid the extortionate £9.49 for a month of Kindle Unlimited, as I have a stack of books I'm waiting to read on there...