A high-stakes teen mystery of danger, deception, and long-lost gangster loot — perfect for fans of The Hardy Boys, YA crime thrillers, and classic pulp adventures.

Seventeen-year-old identical twins Dan and Paul Case think they’re doing a good deed when they pick up a lone hitchhiker. But this stranger is no ordinary traveler.

Eddie Ridgway — ex-accountant for a notorious Prohibition-era gangster — has just been released from prison and is rumored to know the location of a fortune in stolen cash. Before the twins can decide whether to believe him, they’re pulled into a dangerous chase involving two ruthless ex-gang members, Wilbur and Gimpy Dalton, who think the brothers are part of Ridgway’s scheme. It’s a trail of clues leading to a hidden treasure worth killing for.

From backroads stakeouts to heart-pounding escapes, Dan and Paul must outwit seasoned criminals, survive relentless pursuit, and unravel secrets that could change their lives forever.

Packed with vintage gangster vibes, modern pacing, and an addictive treasure-hunt plot, The Cash Cache Mystery is a page-turning YA adventure for teen readers, reluctant readers, and nostalgic fans alike.

First in the Case Twins Adventure series — standalone novels featuring continuing characters and nonstop action.