Sigils (2021, Green Magic Publishers, Green Magic) 4 stars

A pocket guide to sigils and their use, from chaos magic to grimoires, with a …

mostly historical

4 stars

good if you want to learn the history of sigils. it also has a good number of examples of "old school" sigils and crafting technique. it only touches modern thought sigils, so, if you're looking for that, go elsewhere.