If you need another world to live in (and who doesn’t right now?) while George R. R. Martin is finishing his latest, here are three you won’t want to leave. Your jumping-off points are Robert Jordan’s The Eye of the World (“The Wheel of Time” series), James S. A. Corey’s Leviathan Wakes (“The Expanse”), or Brian Sanderson’s Mistborn: The Final Empire (“Mistborn”). You’ll find every title in each series on Overdrive. If one isn’t available, don’t forget to search the digital catalogs of the other Massachusetts networks, listed at the bottom of each book’s page. Maybe by the time you’re finished, Martin will be, too.