1. Ghosts in the House by Kazuno Kohara
2. H is for Haunted House by Tanya Lee Stone
Y is for Yowl (another alphabet book, but decidedly scarier). Jellybean and I enjoy this one a bit more (I like reading it aloud a lot more) and Buddy still loves the alphabet element.
3. The Skeleton in the Closet by Alice Schertle
Have a Happy Day!