Mountain View Regional Library will host three events on Feb. 23 on how to download e-books to Kindle (11 a.m.), Nook (1 p.m.) and iPad (3 p.m.). Throughout the year, various Cobb libraries offer classes on using computers, downloading e-books and creating e-mail accounts. Pre-registration is required. Information: 770-509-2725.

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Inventor Lonnie Johnson stands with his Super Soaker water guns at JTEC Energy on Wednesday, Oct. 29, 2025, in Atlanta. Johnson, a former NASA engineer, is currently working on a new energy technology through his company’s JTEC device that turns thermal heat into usable energy. (Natrice Miller/AJC)