This smartly designed softcover consists solely of the number pi, calculated to 5,000,000 decimal places. By far the biggest pi ever published in book form. It sprawls across 558 oversized pages, big as a city phonebook. Practical? Not really. Cool? Definitely. And if you really want to go whole hog, consider grabbing the primo edition: a beautiful, glossy hardcover [available here]. (For a smaller - but still pretty darn big - dose of pi, check out Pi to Two Million Places.)

Five Places You Meet Fifteen-Year-Old You grapples with the fragility of memory, the ravages of chronic illness, plenty of youthful regrets, and unbridled hope for the future. It's a surreal, strange, and deeply moving trip into a narrator's psyche while her fifteen-year-old self tags along-with the simultaneous curiosity and nonchalant sarcasm you might expect from a teenager.

Presents photographs of the gravesites of seventy-five famous people, accompanied by short biographies that highlight unusual and unexpected facts about their lives and deaths.