The Endless Ocean by Toby Bennett

All oceans are one ocean, water without end and at the heart of it all a secret slumbers, gnawing and waiting, for no secret remains hidden forever. Can two orphans who have never heard of realms beyond their own prevent the destruction that threatens every shore? Only time will tell.

A Case of Madness by Yvonne Knop

Andrew Thomas just got sacked. He's permanently drunk. He's got cancer. Is inescapably gay. Was hit by a bus. And he's fallen in love with a stranger whose life he saved. As a newly-unemployed Sherlock Holmes scholar, Andrew knows only Holmes can help him untangle the madness his life has become, but Holmes isn't real. Except he absolutely appeared in Andrew's house, told him he's in love with a man he just met…and then in a fit of pique Andrew sent him away. Sure Holmes is probably a hallucination or a specter or a ghost, but now Andrew desperately needs his help. So to find the answer to his case and the man of his dreams, Andrew takes to chasing a fictional character through London with his very own Watson.