I Promised Everyone Some Substitute Familiar Short Stories But Before I Knew It I'd Written A Whole Book?

"I Promised Everyone Some Substitute Familiar Short Stories But Before I Knew It I'd Written A Whole Book" is a collection of 25 short stories serving as a semi-sequel, prequel, and companion to the Substitute Familiar light novel series. The book follows the visits to a witch's store and various tales about witches, familiars, and their allies. While beneficial to have read the first book, it is not required to enjoy these short stories.