We have all wondered how the world would be if we could go back in time and change certain events. Jake Epping, Stephen King's latest hero, gets that chance in "11/22/63." His friend Al Templeton reveals there is a time-travel portal in the back room of his diner and he has been traveling between current day and 1958 in the hopes that he can prevent the assassination of John Kennedy. But now Al is dying of lung cancer, and he asks Jake to finish his mission to stop Lee Harvey Oswald.

- We have all wondered how the world would be if we could go back in time and change certain events. Jake Epping, Stephen King's latest hero, gets that chance in "11/22/63." His friend Al Templeton reveals there is a time-travel portal in the back room of his diner and he has been traveling between current day and 1958 in the hopes that he can prevent the assassination of John Kennedy. But now Al is dying of lung cancer, and he asks Jake to finish his mission to stop Lee Harvey Oswald.

- Believed by many to have been the most beautiful woman of her day, actress Hedy Lamarr was much more than just a pretty face. Along with avant garde composer George Antheil, she invented spread-spectrum radio, which was a way of rapidly switching communications signals among a range of different frequencies -- a development that has made cell phones, Bluetooth, and GPS possible. Richard Rhodes, who wrote the definitive history of nuclear energy, returns with a delightful treat: "Hedy's Folly: the Life and Breakthrough Inventions of the Most Beautiful Woman in the World."

- Hoping to solve the murder of her colleague Jack Fielding, Kay Scarpetta travels to the Georgia Prison for Women in Savannah to talk to the woman she believes bore Jack's daughter. In fact, former Manhattan Assistant DA Jamie Berger arranged Scarpetta's trip in the hopes she will look into the 9-year-old murder case of a local physician and his family. Angry at first at being tricked, Kay soon realizes the two cases may be linked. Patricia Cornwell's "Red Mist" is the 19th entry in the Scarpetta series.

- Having cut short her Hawaiian vacation and returned without Morelli, Ranger, or an engagement ring, Stephanie Plum finds herself uncomfortably involved in a murder investigation. It seems her seatmate ended up dead in a garbage can during their stopover in Los Angeles. Before he got off the plane, though, he apparently stashed a photo in Stephanie's purse that has now put her life in danger. Janet Evanovich brings back Trenton's wackiest bounty hunter in "Explosive Eighteen."

- Back in the early '70s, Flora Rheta Schreiber rocked the world with her book about a woman she called Sybil who displayed 16 different personalities. The case brought Multiple Personality Disorder into sharp focus and psychiatrists began to diagnose more and more patients with it. Journalist Debbie Nathan has thoroughly researched the story of Shirley Mason, aka Sybil, and believes it was mostly fabricated -- the result of an elaborate collaboration between Mason, her ambitious psychiatrist, and Schreiber. "Sybil Exposed: the Extraordinary Story Behind the Famous Multiple Personality Case" is fascinating.

- Consider the toaster. It is a deceptively simple-looking device which is usually so inexpensive it is cheaper to replace than to repair. Thomas Thwaites set out to build his own -- all 404 separate parts. Ironically it ended up costing him 250 times more than he paid for his store-bought prototype. "The Toaster Project, or a Heroic Attempt to Build a Simple Electronic Appliance from Scratch" charts Thwaites' epic adventure.

Oak Ridger