Book excerpt: Desperate and on the run, Tillie Thornton finds herself in an uneasy partnership with Graeme McLeod, a daring adventurer who comes out of nowhere to thwart the plot of Tillie’s would-be kidnappers. Now these two must join forces against their common enemies, as well as the challenges of nature, as they embark on a quest that could bring them the answers they seek—or cost them everything. Formerly published as The Treasure of Timbuktu.