Combine the inspiration of the Mandala with Zentangle art, and bring your Zentangles full circle with 40 new tangle patterns and ideas for making beautiful sacred circles.
I like that this is simple, it includes workbook space and steps for new tangle patterns. The workbook section requires nothing further than the 3 basic zentangle supplies, though it gives suggestions of materials in the first half of the book for tools you could use for adding color etc. These are great books.