Hot on the trail of a secret code, Joe and Abi are in trouble. They want to beat the Museum to the location of a prized treasure, but criminal treasure thief Frank Ross is also looking for it. The clues all point to one house, but it's been searched already and now it's closed. The sleuths are left with no choice. They must break in and beat Frank Ross at his own game. * * * * Escape into a world of adventure and mystery with the Treasure Sleuths as they unravel ancient mysteries, discover buried vaults, recover looted archaeological artifacts and search for long-lost treasure. 'The Secret of the Hidden Staircase' is the fifth book in the Treasure Sleuths series, although it can be enjoyed as a stand-alone story in its own right. Other books by Paul Belzoni available on Amazon: 'The Secret of the Lighthouse' (Treasure Sleuths #1) 'The Secret of Drake's Gold' (Treasure Sleuths #2) 'The Secret of the Mad Monk' (Treasure Sleuths #3) 'The Secret of the Royal Clarence' (Treasure Sleuths #4) Receive a FREE secret HART (Historical Artifact Recovery Team) treasure report at: treasuresleuths.com/free