Finished Charlie the Choo-Choo by Beryl Evans. (Really Stephen King under a pseudonym.)
This picture book is about Charlie, the creepy train from the Dark Tower series.
This book itself isn’t creepy (at least text-wise; the illustrations of Charlie are still unsettling, to put it mildly).
If you’re a fan of the Dark Tower series and are curious about the Mid-World Railway Company (clever, right?), check this out. It’ll be the best ten minutes you’ve had in ages.