Your Crazy Aunt Purl has the easy-peasy reliable formula to make a simple roll-brim hat FOR ANY HEAD, from preemie to giantess, in any yarn, on any size needle. [Dear Aunt Purl: HUH??? Decreasing? How? When? Why? Dear Decrease Scaredy: I know. There is Math.] But not much Math. Really!
Also on these boards
Nordic Knitting- this book is in japanese and english, and shows 7 knitting techniques from nordic countries.