There are 5 books in the The Innocents Mystery Series series. The newest book is Innocent to the Last which came out in 2020.

1
The Innocents

Book cover of The Innocents
Pinkerton Detective Abigail MacKay is a master of disguises—and of new crime-solving technology! But she’ll have to move fast to stay a step ahead of Nat Quinn and Jake Conroy.

Nat and Jake are the ringleaders of The Innocents, a western gang that specializes in holding up trains carrying payrolls—and…
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2
Innocent as Sin

Book cover of Innocent as Sin

Nat Quinn and Jake Conroy are just doing their job—robbing a bank! But when Nat sees Pinkerton agent Abigail MacKay is already there, he knows something isn’t right. Is she on the trail of The Innocents again, or has she turned up in Everlasting, Wyoming, by coincidence?

Abi can’t believe…

3
Innocent Bystander

Book cover of Innocent Bystander

Pinkerton Agent Abigail MacKay’s willful sister, Madeleine, is going to be the death of her yet. That is, if Madeleine doesn’t get herself killed first! After running off to marry a widower whose wives mysteriously die—leaving behind a great deal of money each time—spoiled, beautiful Madeleine is unaware of the…

4
In All Innocence

Book cover of In All Innocence

Nat and Abigail have decided that Canada is their best bet for a clean start with their new baby. It’s the place where American and Scottish accents go relatively unnoticed, and newcomers can get lost in a crowd. The problem is that Canada doesn’t have a transcontinental train, so they…

5
Innocent to the Last

Book cover of Innocent to the Last
Nat, Abigail, and Jake are hot on the trail of the mysterious man behind the scenes who orchestrated the murder of baby Ava. Determined to bring her killer to justice, they are prepared to do whatever they must, no matter where the clues lead. Rebecca, an attractive newspaper woman investigating…