▁challeng ed . ▁ ▁Arist oph anes ▁- ▁A ▁cat ▁that ▁lives ▁in ▁the ▁book store ▁in ▁New ▁Rome . ▁In ▁The ▁T yr ant ' s ▁T omb ," ▁Tar quin ▁tries ▁to ▁inter rog ate ▁him ▁on ▁where ▁the ▁Sib yll ine ▁Books ▁are . ▁ ▁Autom aton ▁– ▁High ly ▁developed ▁rob ots ▁with ▁intr icate ▁circuit ry ▁that ▁makes ▁them ▁hard ▁to ▁fix . ▁Most ▁are ▁made ▁out ▁of ▁steel , ▁but ▁some ▁like ▁Fest us ▁the ▁drag on ▁are ▁made ▁out ▁of ▁cel est ial ▁bronze ▁or ▁other ▁materials . ▁In ▁the ▁Per cy ▁Jackson ▁& ▁the ▁Olymp ians ▁series , ▁An nab eth ▁disco vers ▁that ▁many ▁stat ues ▁in ▁Manh attan ▁are ▁actually ▁automat ons ▁created ▁by ▁Da ed alus , ▁an ▁army ▁that ▁could ▁either ▁defend ▁or ▁attack ▁Olymp us . ▁ ▁Argent um ▁– ▁Re yna ' s ▁silver ▁Autom aton ▁H ound ▁who ▁appears ▁in ▁The ▁Son ▁of ▁Ne pt une , ▁The ▁Mark ▁of ▁Ath ena ▁and ▁The ▁House ▁of ▁H ades . ▁ ▁Aur um ▁– ▁Re yna ' s ▁gold ▁Autom aton ▁H ound ▁who ▁appears ▁in ▁The ▁Son ▁of ▁Ne pt une , ▁The ▁Mark ▁of ▁Ath ena ▁and ▁The ▁House ▁of ▁H ades . ▁ ▁Bron ze ▁Dragon ▁– ▁An ▁automat on ▁drag on ▁made ▁of ▁bronze ▁created ▁by ▁the ▁camp ers ▁in ▁He pha est us ' ▁cabin ▁to ▁help ▁defend ▁Camp ▁Half - B lo od . ▁He ▁is ▁first ▁shown ▁in ▁" Per cy ▁Jackson