As everyone followed the Boston manhunt for the Tsarnaev brothers, thoughts turned to Tolstoy’s final novel, ‘Hadji Murad,’ about Chechen rebels fighting Russian imperialism. Benjamin Lytal checks in on the master’s tale of anti-heroism and betrayal. On Friday, while CNN was making constant reference to the Tsarnaev brothers' attempt “to go out in a blaze of glory,” a micro-meme lit up social media: didn’t Leo Tolstoy have a novel about Chechnyan rebels, called Hadji Murad? He does: it was his last, a thin book that everyone should read. While it offers few overt parallels to a case of 21st-century terrorism,...