King County Solid Waste Division: http://www.ecodeals.org/ (Get printable coupons for environmentally-friendly products including yard & garden products.)
Local Libraries: Lake Hills, Newport Way, and Issaquah are roughly 3 miles from South Cove. Bellevue Library is further, but much larger and more comprehensive.
Pets should be on a leash or kept on the owner's property. If not, and the problem can't be resolved by talking to the owner, King County's Animal Control Section may be called at (206)296-7387.
If the animal is trespassing on your property, it is best to log the time and date of the incidences. Animal control considers 6 trespassing incidents a "chronic problem."
Other options are to confine the animal and take it to the Crossroads shelter, or call Animal control and request that they send a patrol to search the neighborhood for pets that happen to be loose at the time.