Elizabeth Webster and The Court of Uncommon Pleas

This book was written by William Lashner and is about a girl who deals with ghosts and demons. Her dad and her grandpa own a company called "Webster and son, Attorneys for the Damned". The main story is about Elizabeth Webster and how she is helping her friend Henry with a ghost haunting his house. I really want to tell the rest but I don't want to spoil the story.