"... first published in Great Britain under the title The adventure of the strange ruby by the Brockhampton Press in 1960. First published by Award Publications Limited 2004 as The young adventurers and the Rajah's ruby"--T.p. verso.
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The riddle of the Rajah's ruby by Enid Blyton. ISBN 9781841357393. Published by Award Publications in 2009. Publication and catalogue information, links to buy online and reader comments.
