The Drowned Vault

The world beneath the waves felt so vivid and imaginative. I wonder what inspired the author to choose this setting over more traditional fantasy landscapes?

The kids faced some pretty terrifying challenges but kept going—am I the only one who found their courage a little exaggerated or genuinely uplifting?

The vault added a great sense of intrigue, but I'm curious if it was always meant to be the main focus or if it developed during writing.