Barbara G Walker - Mosaic Knitting
The Barbara Walker books of stitches are very sought after and can be difficult to obtain. This book concentrates on patterns for mosaic knitting which is all done in garter stitch. If you're not familiar with mosaic knitting, have a look on Ravelry - it's lovely! There are some beautiful shawls around that use mosaic knitting, look at Lisa Hannes' patterns on Ravelry for inspiration.
PLEASE NOTE: This book is charted and does not contain written instructions.