Along with being pleasurable and satisfying, knitting can sometimes be frustrating: the turtleneck that looked so fabulous on the model is too bulky for your body, or the cardigan you spent countless hours on just doesn’t fit right. Herein lies the beauty of Custom Knits, which teaches knitters how to use improvisational techniques to achieve spectacular results-and to unleash their inner designers.

Wendy Bernard, creator of the popular blog Knit and Tonic, provides 25 original designs for sweaters of nearly every type, plus variations, most knitted in one piece starting at the top, a method that allows you to try on as you go, alter as desired, and essentially design on the fly. Make It Your Own prompts in each pattern suggest easy alterations to suit your style and body type. And an in-depth reference section teaches how to alter key sweater elements, for example, change a crewneck to a V-neck, add sleeves to a vest, and much more. For the truly adventurous, the book concludes with guidelines for knitting sweaters with no pattern at all.

Bernard’s friendly writing style and photographer Kimball Hall’s lively images create an inviting book of beautiful designs and key techniques that a knitter can use to customize nearly every garment she knits from now on.