Cartoonist-slash-reporter Joe Sacco is back with his densest work yet, a 418-page plunge into a little-known episode of the Israeli-Palestinian conflict: the 1956 shooting of 386 Palestinian refugees by Israeli soldiers in Rafah and Khan Yunis, impoverished towns in the Gaza Strip. As in earlier works such as Safe Area Goražde, Sacco combines rich black-and-white illustrations and extensive interviews to unravel a tortuous history. Footnotes in Gaza is heavy, but never feels like homework. Read an interview with Sacco at motherjones.com/joe-sacco.