Tom Mach, Lawrence resident and author of the historical novel “All Parts Together,” will sign copies of his new book at 2 p.m. Saturday at Borders, 700 N.H.

“All Parts Together” follows the fictional character Jessica Radford, a spirited 19-year-old Kansas abolitionist, as she fights to end slavery. The novel begins the day after Quantrill’s Raid. Jessica, who witnesses the massacre and its tragic aftermath, decides to travel to Washington, D.C., to convince Congress to end slavery. Once there, she meets President Lincoln, on whom she pins her hopes for abolition. Her hopes are crushed, however, when she witnesses Lincoln’s assassination in the last chapter of the book.