Gettysburg is one of the most famous and studied battles of history, and Pickett's Charge, its climax on the third day, continues to fascinate a new generation of readers. Most accounts of the grand assault focus on General Robert E. Lee's reasons for making the charge, its preparation, organization, and ultimate failure. Author David Shultz, however, in "Double Canister at Ten Yards" The Federal Artillery and the Repulse of Pickett's Charge, July 3, 1863, focuses his examination on how and why the Union long-arm beat back the Confederate foot soldiers. After two days of heavy fighting on...