Five Things You Need to Know Today: March 31

1. Greer Tan Swiston Campaign Kick-Off. Ward 3 Alderman-at-Large Greer Tan Swiston . Swiston will launch her campaign by running across the district -- from Auburndale () to Newton Corner () -- starting at 9 a.m. Swiston will also make stops along the way to meet with voters. 

2. Spring Fling. The will close at 4 p.m. today in preparation for its Spring Fling event. The annual fundraiser starts tonight at 6:30 p.m. and will feature a number of authors and books (list available here) including Leah Hager Cohen, Edith Pearlman, Tim Riley and Lou Ureneck. Proceeds from the event benefit the library. Tickets/donations range from $125-$2,500 and are available online. 

3. The Tangled Loon at WLC. The will from 10:30 a.m. to noon. Cassarino-Brown will be on hand to speak about her new book The Tangled Loon as well as sign copies. Fun, games and snacks will also be available at the event. Families with children ages 5-11 are encouraged to attend. For more information, contact wabanlibrary@gmail.com or 617-244-0700.

4. A Cappella for a Cure. will take place tonight at 7:30 p.m. at the . Tickets are $20 and will benefit the American Cancer Society's Relay for Life. 

5. Free running clinic. Kids 8 years and older are welcome to this afternoon at . Newton South graduate and marathoner Leo Westebbe will join Charles d'Hemecourt from the Division of Sports Medicine Children's Hospital Boston for the clinic, which starts at 1 p.m. Kids and families should wear proper running attire and footwear.