There are 5 books in the Dog Club Mysteries series. The newest book is Sit, Stay, Slay which came out in 2020.

1
In the Dog House

Book cover of In the Dog House
Her new canine companion is a lot more loyal than her ex-husband—but that doesn’t mean she wanted him dead….
 
Lilly may be losing a husband but she's gaining a toy poodle. That could be seen as a win-win, since her new adopted pooch Aggie (named after Agatha Christie) is cute…
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2
The Puppy Who Knew Too Much

Book cover of The Puppy Who Knew Too Much
Lilly Echosby and her toy poodle Aggie find a fresh start in Chattanooga, Tennessee, spoiled by the scent of murder . . .
 
Having solved the shooting death of her cheating husband, Lilly's left behind the drama of Lighthouse Dunes, Indiana, to start over in the hometown of her best…

3
Bark If It's Murder

Book cover of Bark If It's Murder
Lilly Echosby just witnessed a murder on a pet cam. Or did she?

When a last-minute opportunity arises to accompany her boss to an art auction in Atlanta, Lilly throws some money at the problem of where to board her toy poodle Aggie (short for Agatha Christie). Posh Pet Haven…

4
Paw and Order

Book cover of Paw and Order
Dog-loving divorcée and amateur sleuth Lilly Echosby is not the only one who wants her new foster poodle. Some are willing to kill to have him . . .
 
Lilly's best pal Scarlett “Dixie” Jefferson has done it again! She’s convinced eccentric poodle-loving billionaire Archibald Lowry to sponsor a grand…

5
Sit, Stay, Slay

Book cover of Sit, Stay, Slay
When her best friend Dixie is suspected of killing a dog show judge, Lilly must bring one sick puppy to heel . . .
 
Tennessee transplant Lilly Echosby has two great loves: dogs and mysteries. So naturally she's named her poodles Aggie, after Agatha Christie, and Rex, for Rex Stout.…