The Fairfield Library's most popular teen event, an after-hours mystery night, is planned for Saturday, Oct. 19 from 6 to 8:15 p.m. at the Main Library, 1080 Old Post Road.

Mystery Night creates a fantasy world where things have gone terribly wrong, and investigators enter the dark and empty library to search for clues to the mystery and save the world, while avoiding dark things that are lurking within the stacks.

Registration is required. Teens who have attended mystery nights before can also volunteer by contacting teen librarian Nicole at nscherer@fplct.org.

Also on Saturday, Oct. 19, teens interested in learning how to have an impressive college interview can attend an interview prep session. At the session from 2 to 4 p.m., presenters Peggy Marx and Kyrie Stillman of College Interview Counselors will review the key aspects of the interview, and include two mock interviews for the audience to critique.

Marx and Stillman have been co-chairs of the Tufts Alumni Admission Program for over 25 years of combined experience and have interviewed hundreds of students.

The program is for teens and parents and registration is required. The interview program is part of the Library's Getting Ready for College series. A new topic will be covered each month.

For more information and to register for either event, visit www.fairfieldpubliclibrary.org or call 203-256-3160.