Bibliophiles, get out your jammies, brew the coffee and stock up on energy drinks: The sixth annual Read-A-Thon returns this weekend. The event, sponsored by the Gainesville/Hall County Alliance for Literacy, runs for 24 hours from 5 p.m. Friday to 5 p.m. Saturday at the Hall Book Exchange, 1854 Thompson Bridge Road in Gainesville. It is part of Make a Difference Day, the nation’s largest day of community service, sponsored by USA Weekend and Points of Light.