pp 656 Grades 5-9 hardback with paper dust jacket both in very good condition; no edgewear; clean pages; sticker residue on spine; brown board with cold title on spineIn TUNNELS, boy archaeologist Will Burrows went in search of his missing father--and discovered a sinister subterranean world. Now in DEEPER, wandering the dark, hot bowels beneath the Colony with his best friend, Chester, and his brother, Cal, Will stumbles across the Styx's dastardly plan to exterminate all Topsoilers by unleashing a lethal plague. Slowly he begins to piece together the plot. But how can Will save the Topsoilers from annihilation when his own life is at risk--and his killer stepsister is still at large?