The Death (and Further Adventures) of Silas Winterbottom — Stephen M. Giles

Liars, thieves, and crocodiles...three cousins quickly discover this is one doomed family reunion

Meeting for the first time, cousins Milo, Adele, and Isabella soon realize that nothing is as it seems: Lured to their sick Uncle Silas's home under the pretense of becoming heirs to a vast fortune, the trio figures out too late that Silas is a bone-chilling villain who will stop at nothing to prevent his own death.

The Body Thief is a quirky mystery of three cousins discovering their uncle's ludicrous plans for immortality-while avoiding his hungry pet crocodile