Garden up! : smart vertical gardening for small and large spaces by Susan Morrison & Rebecca Sweet — Like a lot of gardeners, I have filled up the spaces in my yard and am often looking for more creative ways to use my limited space. This book has a wealth of ideas for small spaces like mine but also for large gardens. It starts with the basics - arbors and trellises - and moves on to less common techniques like living walls and growing edibles vertically. There's plenty of inspiration here!