It’s the 30th anniversary for the world’s best-loved missing person, Waldo, and Island Books (along with other Mercer Island merchants) is celebrating.

Throughout the month of July, look for businesses on Mercer Island with the “Shop Local — Find Waldo” sticker on their windows. Hidden somewhere within them you’ll find a hidden Waldo or his friend Wenda. When you do, get your passport stamped for proof. Three stamps earns you a button and a discount coupon; a stamp from every participating business enters you in a drawing for the grand prize at the end of the month!

Local institutions on the Waldo hunting trail include: Island Books, Mercer Island Chamber of Commerce, Banner Bank, Mercer Island Orthodontics, Yoga Bliss, Pagliacci Pizza, Mercer Island Athletic Club, Homegrown, Island Cats Veterinary Clinic, All the Best Pet Care and Mobile Chiropractic.

See www.mercerislandbooks.com for more.