Onetomb

Ollie Twill and Adelaide Thickets, cousins by chance, and their friends, Sanity Heartstrings and Justin Case intend spending the summer on top of their city, Onetomb, a steampunk wonderland's roofs and throwing firecrackers into Old Man Rustinail's pond, the way it's been every summer since the old school house burned "mysteriously"when a (cough) accidental match was set in the old broiler room. But, They poke their noses in on trouble in the old and abandoned mansion that once belonged to Dan Druff, an old man with a brutal wife and two mistreated daughters, Honey and Dew . But the family has died years ago and the Druff's aren't even a memory.But what if an an ancient diary leaves more clues about the house's past than anyone intends to learn, and it leads to danger, even death- at every turn.
The friends must know these cryptic secrets, but at what price? What mysterious secret is buried so deeply in the house, that hundreds of peoples died trying to uncover, and failed many times?