Missing? Donny asked.
Dont you mean stolen? I said to Saba.
Donny and I gave each other The Look. We knew we had to help, but how?
Eight-and-a-half-year-old twins Donny and Vivi are back, ready to solve another mystery. When the shuls sefer Torah fund goes missing, the duo leaps into action. As they follow the cryptic clues, they uncover a mysterious trail of riddles.

Who were the Tunnel Keepers, and why did they protect their secrets so carefully? How will Donny and Vivi recover the stolen money? Get ready for some fun exploration in this new mystery, the second in the Tunnel Keepers series, by popular author J. S. Wolin.