Louise recommends The Nordic Knitting Primer by Kristin Drysdale

Whether you are a longtime knitter or have just learnt to cast on,
The Nordic Knitting Primer is an amazing resource. Kristin Drysdale connects the knitter with patterns from her Scandinavian roots and shares technique tips, how-to, and design inspiration. She also has a website called "Scandiwork." This book really makes colorwork accessible. Drysdale shares that " I believe the most important thing in knitting, whether you're a beginner or a seasoned expert, is to knit what you love."
Publisher's description:
Gorgeous Scandinavian knitwear is within reach for knitters of all levels with this collection of timeless patterns and essential techniques... Inspired by Kristin's Scandinavian heritage, these designs combine traditional patterns and motifs with stylish, easy-to-wear shapes. Knitting with multiple yarns creates a warmer knit fabric for high-quality garments and accessories to gift or wear all year long