Imagine a world where cities are designed sustainably with an aim of positive living for all. The Ideal City, published by Gestalten (£24) and available to purchase at gestalten.com, celebrates forward-thinking urban initiatives that contribute to a brighter future. Spilling with big, bold ideas, this beautiful but digestible coffee-table book was created with Copenhagen-based research geniuses SPACE10. It includes stories of visionary innovation and hope-stirring wisdom from architects, designers, entrepreneurs and community leaders about game-changing projects in 52 cities in 30 countries. We spotlight some of the smartest solutions where leftfield designers have approached construction and infrastructure in such a way that micro innovations have potential to influence on a macro scale.