"Don't call me elderly!"

Gertrude is still feeling confident after her first gumshoe victory. So when she finds a murder victim at her local thrift store, she is excited to tell the Sheriff's Department everything she's learned at the scene of the crime.

Unsurprisingly, they don't listen. So Gertrude must solve the mystery herself. And the only way she can figure to do this is to go undercover—as the Mattawooptock Thrifty-Help's newest team member. Anyone who knows Gertrude knows this probably isn't the best idea. She'll probably get fired. Or arrested.

Or worse.

Merrill’s second comic mystery featuring a curmudgeonly sleuth (after Introducing Gertrude, Gumshoe) is even funnier than her first… Readers who enjoy tongue-in-cheek whodunits will find themselves grinning frequently. —Publishers Weekly

The Gertrude, Gumshoe Books in Order:

Book 1: Introducing Gertrude, Gumshoe

Book 2: Gertrude, Gumshoe: Murder at the Thrift Store

Book 3: Gertrude, Gumshoe and the VardSale Villain

Book 4: Gertrude, Gumshoe: Slam Is Murder

Book 5: Gertrude, Gumshoe: Gunslinger City

Book 6: Gertrude, Gumshoe and the Clearwater Curse

Gertrude in South Dakota Book 1: Gertrude, Gumshoe: S'more Murder

Gertrude in South Dakota Book 2: Gertrude, Gumshoe: Haunted Hotel

Gertrude in South Dakota Book 3: Gertrude, Gumshoe: Cowboy Shoot

Gertrude also makes an appearance in Minivan Malice.

(Keywords related to this cozy mystery: funny mysteries, senior characters, mysteries with senior detective, mysteries with retired detective, cozy mystery, cosy mystery, mystery series, retired characters, murder mysteries with humor)