This was a cute and funny book, appropriate for younger readers. I’d say a 7 or 8 year old could read it, and my 4 year old enjoyed listening to it and seeing the pictures.
Chester is invited to a slumber party. Being a shy introvert, he doesn’t know what to do at the party, but feels he has to go. Meanwhile, his ghost friend Simon has to pass an inspection which grades his ability to haunt. They decide to help each other out by giving rather silly advice.
Simon and Chester start a detective agency and solve their first crime.
Chester just wants to be part of a normal family, but discovers no family is perfect. Simon attends a ghost convention, and discovers bullies’ opinions don’t matter.
Hibernator's Library 
2 thoughts on “Simon and Chester series, by Cale Atkinson”