Cobb County Libraries will hold a semi-annual book sale 9 a.m. to 5 p.m. March 8-9 and 1-5 p.m. March 10 at Jim R. Miller Park on 2245 Callaway Road in Marietta. Donated items include soft-cover and hard-back books, magazines, text books, DVD and VHS movies and children’s books. Prices range from 10 cents to $5. Volunteers are needed. Information 770-528-2331.

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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)