Sold on ebay for $50.86 with shipping. Very good used condition but one has a bend in the front cover as shown in last picture. "Follow archaeologist Jake Cooper and his teenagers, Jay and Lila, as they plunge through tangled jungles, meet "ghosts" from the past, search for missing standing stones, and battle ancient evil forces. These Indiana Jones-like adventures will keep readers on the edge of their seats while teaching biblical values! Titles Include Door in the Dragon's Throat, Escape From the Island of Aquarius, Tombs of Anak, Trapped at the Bottom of the Sea, Secret of Desert Stone, Deadly Curse of Toco-Rey, Legend of Annie Murphy, Mayday at Two Thousand Five Hundred. Recommended for ages 10 to 14."