Do you love charts? Cody Westphal and Jason Oberholtzer do, and they blog about it on I Love Charts ("By people who love charts for people who love charts"). Next week, their Tumblr-to-tangible cycle will be complete with the publication of I Love Charts: The Book (Sourcebooks). So why pony up $10.99 for a paperback when you can get your chart fix online? The book not only includes never-before-seen charts dedicated to subjects such as technology, politics, love and the minutiae of everyday life but also a good deal of thoughtful writing. "The book has an arc, is occasionally recursive and occasionally non sequitur," promises Oberholtzer. "It's not just the blog put in a binder. It's a self-contained project we put a lot of thought into."