Presidential elections in Rhode Island are usually landslides these days. Book sales are a lot closer.

That’s according to Amazon.com, which has created a “heat map” showing which political books sell the most copies in each state. Across the U.S., 58% of book purchases are “red” books and 42% are “blue” ones – and red books have the advantage in 46 states. Rhode Island is one of four exceptions, with 51% of book purchases classified as “blue.”

Ezra Klein points out that it’s possible to quibble with Amazon’s classifications: Is Robert Caro’s LBJ bio really a partisan-leaning “blue” book? Is Politico’s latest e-book a red one? Here’s the local list as of Wednesday:

On the blue list, Joe Stiglitz sells better in Rhode Island than he does nationally, while Howard Zinn is more popular nationwide. On the red list, the Politico e-book doesn’t even make the national list while it’s #5 in Rhode Island, while U.S. #3 “Obama’s America” by Dinesh D’Souza doesn’t crack Rhode Island’s top five.