Continuity mistake: In the epilogue, when Chad is speaking in court, Sharon's attorney says that Ann's mother died "'last year'". During the flashback in chapter three, when the group is at the river before hiking to the cliff, Ann's mother is described as having died "a couple of years" ago.
Continuity mistake: After the "adventure in acceleration" at Adrian, the Hail Mary is effectively upside down (Ch. 20). Then Grace gets "sick of living in the Poseidon Adventure" and rights it-meaning the storage area is at the bottom again. He goes in there to fix a leak, then "climb[s] back down and wince[s] the whole time." He should be climbing up or out, not down. Also, in Ch. 22, when Grace is in there again (finding Taumoeba poo), "Rocky calls out from below"-but Rocky should be above him, not below.
Continuity mistake: David and Steve are playing racquetball. There is nothing on the brown wooden floor, and neither have a towel. David becomes woozy, so Steve checks on him. There is a white towel on the floor, behind their feet, which disappears when they resume their game. (00:01:42 - 00:02:20)
Continuity mistake: In the second chapter it states specifically that Lillith is texting on her iphone however after receiving a text from a friend she says she closes her phone or snaps her phone shut suggesting that she is using a flip phone.
Continuity mistake: When the Kingdom Keepers are inside the It's A Small World attraction, and the puppets come to life, the book states that a doll locked onto Finn's arm, chomping down hard enough to draw blood. However, at the girl scout car wash, Finn shows Amanda his bite marks by lifting up the leg on his shorts.