The Lost City Explorers, Vol 1

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"Lost cities aren't the stuff of myth! They exist right under our feet. When her archaeologist father goes missing, teenager Hel Coates rallies her friends and brother to find him. They'll have to dodge a shady corporation, mercenaries and speeding subway trains while they follow the trail deep into the tunnels under Manhattan--and what they find down there will change their lives forever. Follow Hel and her friends on a coming-of-age journey through subterranean tunnels, and ultimately to the holy grail of lost cities: Atlantis!"--Page 4 of cover of v.1