"Well paced and tightly plotted, with a tang of Agatha Christie." The Times Children's Book of the Week

Alice and Sonny investigate a stolen jewel, in this installment of the bestselling Mysteries at Sea series, from award-winning author A.M. Howell.

Alice and Sonny are excited for their summer trip, sailing on the luxurious yacht the Lady Rose. They're even more excited when they find out the King of England is going to be onboard too!

There's also a precious jewel on the boat - a rare opal, kept in a tank protected by a poisonous octopus.
Until one morning, Alice discovers that the opal and octopus are both missing. The search is on to retrieve the priceless gem, before the ship reaches its destination, and everyone on board finds themselves in serious trouble.

As Alice and Sonny's investigations take them closer to the truth, they realise that everyone on the Lady Rose seems to have a secret, maybe even the king himself...

Praise for the Mysteries at Sea series:
"A thoroughly modern thriller." Daily Telegraph
"A true ocean delight packed with peril, adventure & secrets galore." Hannah Gold, author of The Last Bear
"An exquisitely plotted nautical adventure, packed with mystery and derring-do." Judith Eagle, author of The Accidental Stowaway
"A high-octane nautical adventure, brimming over with secrets and sabotage." Nicola Penfold, author of Where the World Turns Wild
""Will appeal to fans of the Adventures on Train series." The Bookseller
"Absolutely unputdownable." Zillah Bethell, author of The Shark Caller
"Brilliant story which kept me gripped until the very end!" Ewa Jozefkowicz, author of The Dragon in the Bookshop