Haunted Fortress - Island of Fog Legacies, #4

A magical fantasy adventure with shapeshifters and creatures from myth and legend. Suitable for all readers 9 and up. Parents, read this with your children! Young shapeshifters Travis and Melinda are tasked with visiting the infamous Haunted Fortress to uncover its dark secrets. The residents of Hemlock, a small seaside village, have been seeing a phantom figure on and off for the past two hundred years.
The phantom has many names - Screeching Witch, Fiery Goddess, Ghoulish Ghost, and Mechanical Lady for starters - but she's mostly known as the Snake Lady, a naga who appears out of thin air and then vanishes again. The fortress is something to behold, floating above the sea just off the coast. And what's with the block of ice in the main chamber? Not only does it refuse to melt despite repeated attempts at thawing, the naga folk in the nearby woods suggest it contains a perfectly preserved corpse and should be left well alone.
Miss Simone disagrees. With Travis as a super-heated cherufe and Melinda as a naga girl, their two-pronged mission is to melt the ice and debunk the phantom... HAUNTED FORTRESS is the fourth installment in the Island of Fog Legacies series. Good, clean, sometimes scary fun for young readers, and suitable for adults as well.