A first year textbook at Cackle's Academy. Students are presented with a copy at the end of their first year, which is described as a 'Three-inch-thick volume bound in black leather', although they have paperback editions for use in class.
At the end of the first year, each pupil receives a copy of The Popular Book of Spells, a three-inch thick volume bound in black leather. This was not really to be used, as they already had paperback editions for the classroom, but like the cats it was another piece of tradition.
The Popular Book of Spells is the main spellbook that the students use. It is mentioned in the books and appears in both the 1998 and 2017 TV series.
In the book, The Worst Witch, The Popular Book of Spells is illustrated as a black hardcover book with the Cackle's Academy crest on the cover. In the 1998 TV Series, it is a paperback book. In the 2017 TV Series, it is renamed 'Book of Spells' and looks similar to book illustration, being a large, dark green hardcover book with the Cackle's Academy crest on the cover, and a green and gold marbled effect on the sides of the pages.