A book that brings back a lot of memories for me is The Witch Family by Eleanor Estes, published by Harcourt, Brace & World in 1960. It is 186 pages so you will want to do what Mom did, read it in sections.
There are adventures of make-believe between an Old Witch, Little Witch Girl and a Weeny Witch along with two mortal girls. Their fun fantasies and humorous imagination make this Halloween story a classic.
To attest to how great this story is, it can still be purchased new. You can order it online or request it from your local book store. The cover is now different from the original.
A second book is from 1969 called The Wednesday Witch by Ruth Chew. Oh, I loved this book. A little girl, Mary Jane is home alone and she cannot let anyone come in. There is someone knocking on her door—a WITCH who travels on a vacuum cleaner! It is so well written and poor Mary Jane has an adventure at every corner! This book is still available through used book services. I think it is out of print. It is a fun book full of fantasy.
The Witches by Roald Dahl and illustrated by Quentin Black in 2007 is fun and exciting. A seven-year-old boy has an encounter with real witches. He, a friend and his grandmother work together to expose the witches. A terrific use of allowing the characters to use their imagination. It certainly sparked my imagination even at this age!