Cowling Around is a collection of 9 crochet cowl designs.
It has a variety of designs to suit all - from granny squares to star motifs, from texture to ripples, from short to long, from narrow to snood.
All patterns are written in UK crochet terms and have charts, some also have diagrams to help you.
Whilst each pattern uses a specific yarn (from 4ply to chunky) they can all be varied and ideas on variations in yarn and size are included in the pattern notes.
It is available either as an ebook, here on Ravelry, or as a printed A5 size book in my Etsy shop (this includes an ebook download).