Here are some of my favorite spooky books from early childhood that made a huge impression on me.
RABBIT AND SKUNK AND SPOOKS by Carla Stevens, Pictures by Robert Kraus

Robert Kraus's simple black/ white/ orange interior color scheme is great. Check out Rabbit wandering through the forest with the jack o' lantern that his buddy Skunk stuck on his head. I totally want to do a big eerie painting of this scene in my style to hang up in my house....this is a fun, innocent kids' book but I always felt this image had a lot of genuine creepiness going on:



RABBIT AND SKUNK AND THE SCARY ROCK by Carla Stevens, Pictures by Robert Kraus

Again, the art starts out simple and fun but check out this full-bleed image where Skunk gets tired of being terrorized by the very loud, scary noises coming from behind the big rock:



HOW SPIDER SAVED HALLOWEEN by Robert Kraus

Robert Kraus strikes again, this time writing a very cool story about 3 bug friends on Halloween night scaring away bullies. Awesome.

GHOSTS AND CROWS AND THINGS WITH O'S by Leonard Kessler

Another cool book with a Halloween-themed color scheme (though it's got lots of non-spooky stuff going on inside as well):



THE MONSTER ACTIVITY AND GAME BOOK by Tony Tallarico


Best book in the universe. Loaded with scary posters to customize and color, "How to Draw Frankenstein and Dracula" tutorials, creepy mazes, "Monster Mobile" art to cut out and hang including these beauties:

Basically all kinds of mind-blowing stuff for a little kid. I'm wicked glad I still have this gem. Years later when I read Stephen King's Pet Sematary, this picture from "the Monster Activity and Game Book" jumped to mind when I got to the part where the floating, gibbering head in Little God Swamp scares Louis Creed: