Various Halloween kids' books are on sale. They're the same prices at various retailers (I spot-checked prices at Kobo and Amazon), but
Barnes & Noble has a clickable list.
I want to mention that kids' books tend to be wonky in terms of device support and most won't download to PC apps.
Make sure that your device is supported.
- Barnes & Noble books often work only on NOOK tablets or an iPad
- Amazon books often work only with a tablet app (Android or iPad)
- Kobo books often work only with a Kobo tablet
There are a few other free books by Jennifer Fosberry and illustrated by Mike Litwin that I noticed for NOOK tablets:
Isabella: Star of the Story
B&N
My Name Is Not Alexander
B&N
My Name Is Not Isabella
B&N
Here's a list of "NOOK Read To Me" titles, sorted by price. If you're just looking at freebies,
Alphabet! is the first book that isn't free, so you know where to stop.