The fourth globe-trotting installment in the exciting SECRET AGENTS JACK AND MAX STALWART series, by beloved children's author Elizabeth Singer Hunt (SECRET AGENT JACK STALWART). Now Jack teams up with his older brother Max to solve a thrilling California puzzle, using their special training as Global Protection Force agents.

In the foothills of California's Sierra Nevada Mountains, an unbelievable discovery is made: $10 million in rare coins dating back to the California Gold Rush! Secret Agents Jack and Max Stalwart are sent to protect the treasure. But almost as soon as they arrive, it vanishes into thin air. Little do they know that the culprit is someone from Jack's past. Unfortunately for the brothers, the criminal isn't only after the loot. He wants revenge.

This is book 4 in Secret Agents Jack And Max Stalwart .

This book has been graded for interest at 6-9 years. This book is part of a reading scheme, meaning that it is a book aimed at children who are learning to read.

There are 137 pages in this book. This is a chapter book. Publishers market early chapter books at readers aged 6-10 years. This book was published 2019 by Hachette Book Group .

Elizabeth Singer Hunt is best known as the award-winning author of the SECRET AGENT JACK STALWART chapter book series for younger readers. The 14-book series has been named a 'must read' for boys by the British Education Secretary, serialized by BBC Radio, and featured on Virgin Atlantic Airways' international flights. Ian Rimmer has written for many British publications including 2000 AD and Action Force. Brian Williamson is a prolific artist with a host of credits for Marvel UK, including Shadow Riders and The Real Ghostbusters.