** The Radio 2 Book Club Choice ***'Witty and emotional ... a page-turning delight' Maria Semple, author of Where'd You Go, BernadetteThis is a love story that could only happen because of a time-travel accident. In it we meet Tom and Penny, who belong to a world so perfect there's no war, no poverty, no under-ripe avocados. But when something awful happens to Penny and Tom tries to make it right - you guessed it, with time travel - he accidentally destroys everything and wakes up in our broken, mixed-up world. Only here, Penny and Tom have a second chance. Should he try to fix everything and go back to his brilliant, but loveless world, or remain in our messy, complicated one and take a chance on being happy with Penny?'A mind-bending time travel caper' Guardian'Sharp and funny' Daily Mail'Thrilling and refreshingly optimistic' Andy Weir, author of The Martian'Amazing, dazzling, exuberant, touching' Washington Post