Author:
Avery, Tom (Children's story writer) author.
Edition Statement:First American Edition.
Imprint:New York : Schwartz & Wade Books, [2016]
Description159 pages ; 22 cm
Note:"Originally published in paperback in different form by Andersen Press Limited, London, in 2015"--Copyright page.
Note:"A Junior Library Quild selection"--Jacket flap.
Target AudienceAges 9-12.
Note:Can a mysterious sea creature save eleven-year-old Jamie's very sick twin brother?