The Perfectly Fine House by Stephen Kozeniewski & Wile E. Young is a wonderfully heartwarming (but also heartbreaking) tale about an alternate reality where the breathing and the ghosts live together in society.
Ghosts
[Book Review] The Perfectly Fine House
[Book Review] Scary Stories To Tell In The Dark
The Scary Stories To Tell In The Dark collection is an awesome collection of tales that ranges from a little humorous to completely horrifying for readers ages 8-12.