Events related to books and those that enrich your mind, such as book signings and sales, book clubs and writers groups, lectures, classes and discussions. Deadline is two weeks before event date.

The Great War: 7 p.m. Tuesday, Sept. 20, Rolling Meadows Library, 3110 Martin Lane, Rolling Meadows. World War I was great only in the sense of its scope; all six inhabited continents were involved. Professor Gary Midkiff will discuss why the war did not have to be fought, yet all major European powers staked their futures on military success. Trench warfare and poison gas were invented during the conflict, and when the war was over, seeds were planted to assure another one. Sign up at the Welcome Desk, call (847) 259-6050, or register at www.rmlib.org.

Bell Bottoms, Disco & Nixon; The 1970s: 7 p.m. Tuesday, Sept. 20, Poplar Creek Public Library, 1405 S. Park Ave., Streamwood. Join historian Jim Gibbons for this lively slide presentation program series as he uses his passion and knowledge to relive the history, fads and fashions of the 1970s. Registration recommended, but walk-ins are welcome. Register at (630) 483-4910.

Book Group To Revisit The Lusitania: 6 p.m. Wednesday, Sept. 21, Des Plaines History Center, 781 Pearson St., Des Plaines. discussion of “Dead Wake: The Last Crossing of the Lusitania” by Erik Larson. Adults and high school students are welcome. This best-seller does more than describe the sinking of the RMS Lusitania in 1915. It captures the drama and power of a disaster whose true meaning has been obscured by history. The book discussion is free and open to the public. To register, call (847) 391-5399. Co-sponsored by the History Center and the Des Plaines Public Library. For information, visit www. desplaineshistory.org.

Prospect Heights Book Club: Noon Wednesday, Sept. 21, Prospect Heights Library, 12 N. Elm St., Prospect Heights. No required reading this month. Instead, read a banned book. Or read a book that hasn’t been banned. Registration required at the Information Desk, (847) 259-3500, ext. 35 or at www.phpl.info. .

Prospect Heights Library Computer Club: 2 p.m. Wednesday, Sept. 21, Prospect Heights Library, 12 Elm St., Prospect Heights. Monthly discussion group about everything tech. This month’s discussion will be web-based genealogy resources at the library. Free, just drop-in.

QuickBooks for Entrepreneurs: 9 a.m. Thursday, Sept. 22, Harper Professional Center, 650 E. Higgins Road, Suite 15S, Schaumburg. Hands-on class designed for entrepreneurs with little experience working with QuickBooks. Topics include setting up a new company, accounts receivable and accounts payable transactions, bank reconciliation, credit card reconciliation, running basic financial reports, tracking and paying sales tax. $150. For information or to register, goforward.harpercollege.edu.

Tech Keys; Opening Doors to Literacy: 7 p.m. Thursday, Sept. 22, Adlai E. Stevenson High School, 1 Stevenson Drive, Lincolnshire. Learn how robots, coding and augmented reality apps are being used for early literacy. From flashcards that function a whole lot like Pokemon Go to kid-friendly robots that teach sequencing and symbolic thinking, you’ll come away with a great list of tech tools that you can start using in the classroom or at home. Program is free and open to all parents and educators. Sponsored by the Vernon Area Public Library and the Community Parent Network. Register at http://bit.ly/TechKeys, (224) 543-1485 or in person at the library.

Mystery by the Book discussion group: Noon on the fourth Thursday of each month, at Poplar Creek Public Library, 1405 S. Park Ave., Streamwood. Copies of book discussion books are available at the Fiction Desk. All welcome. Contact Linda, (630) 483-4949.

An Evening with Mr. and Mrs. Lincoln: 2 p.m. Friday, Sept. 23, Indian Trails Public Library, 70 W. Dundee Road, Buffalo Grove. Mr. and Mrs. Lincoln, played by veteran actors Max and Donna Daniels, will share stories about their lives together from courtship, to his rise to the presidency and struggle to hold a nation together during the Civil War. Sponsored by The Indian Trails Public Library, registration required at www.itpld.org.

Conversational English: 10 a.m. on the second and fourth Friday of each month, Bartlett Public Library District, 800 S. Bartlett Road, Bartlett. English practice for ESL learners at all levels is offered in partnership with Literacy DuPage in a relaxed and fun manner. No registration or preparation is necessary. All English as a Second Language learners are welcome. For information, www.bartlettlibrary.org.

Tech Assistance Drop In:6 p.m. Friday, Sept. 23, Indian Trails Public Library, 70 W. Dundee Road, Buffalo Grove. Have a question about your device? Thinking of trying Overdrive? Chat with an Adult Services staffer about these topics and more. One on one help with no appointment necessary. Please bring your device and login information.