Looking at what people are reading while they ride to work on the train is an odd hobby, but I’ve been doing it for several months now and I can’t seem to stop myself. In fact, it’s become all the more fascinating now that I’ve noticed some patterns emerging. Here’s what I observed during my travels between the North Side and the Loop on Friday:Reading for school: This is the broad category that includes everyone from high schoolers reading Shakespeare to the upper echelons of post-graduate academia. Since school’s out, you mostly just see the post-grad end of the spectrum at this time of year. Friday’s sighting: Race, Real Estate, and Uneven Development: The Kansas City Experience, 1900-2000 by Kevin Fox GothamConsumers of popular non-fiction: This may be the largest group of readers on the train. Perhaps fiction is too light (or too heavy) for the commute, and these nine-to-fivers require something concrete, yet engaging, to bookend their working day. Friday’s sighting: Nickel and Dimed by Barbara Ehrenreich; Under the Banner of Heaven by Jon Krakauer; Arc of Justice by Kevin BoyleReading for fun: These people, on the other hand, require a diversion on their way to and from work, something boldly written and fast-paced to inject a little excitement into the weekday. Spotted on Friday: The Broker by John Grisham; Harry Potter #4 and #6 (Potter – and not just #6 – is nothing short of ubiquitous on the train these days)The readers: These are the people I envy. I like to imagine that they’re not on their way to or from work but that they ride the rails, like modern day hobos, all day long, enjoying the gently swaying carriage with their noses buried in books. Spotted on Friday: Sons and Lovers by D.H. Lawrence.