Hidden in five chests across the US, the bounty includes everything from a Picasso pendant to Jackie O’s sapphires and a spot of crypto currency. We meet Jon Collins-Black, writer of the book behind the hunt – and a searcher himself

Jon Collins-Black’s mother had always dreamed of living in a log cabin. So when his father, a minister, was given 20 acres of land by a member of his congregation, he built her one in North Carolina. “Literally with his bare hands,” Collins-Black says. On sweltering days, the young Collins-Black would chase lizards, sneak up on snakes, and dig holes. On balmy nights, he’d wonder what he might find the next day. Still, closest to his heart were his days spent at the Emerald Hollow Mine, a 20-minute drive away at the foot of the Brushy Mountains. There, he’d sift in the creek and poke through the dirt on the hunt for treasure.

Over three decades later, Collins-Black has kicked off a real-world treasure hunt – what he believes to be the largest in US history – for a trove worth several million dollars. He has hidden five boxes – one containing “the lion’s share”, and four smaller ones – across five US states. Collins-Black’s new book There’s Treasure Inside, published this month, acts as a 243-page treasure map containing the origin stories of each item and clues about how to find them.