Following a horrific experience at Verdun, Private Tommy Catkins - shell-shocked and suffering head injuries - is sent to a mysterious island hospital in Wiltshire, where he is subjected to the primitive treatments of the era.
But the island appears to be a portal to the enigmatic land of Onderwater, where lives a race of blue-skinned people with tails.
Will Tommy be tempted by Onderwater, or will the love of Nurse Vann pull him back to reality, and recovery?
"One of the most inventive and imaginative fantasy writers I know of..." Teresa Edgerton
"A story that mixes history and fantasy, and does not encourage you to feel confident about what's real, and what's delusion brought on by trauma ... A haunting and deeply uneasy book that won't offer you tidy solutions."
(Nimue Brown, Druid Life)