If you’re still paying full price for audiobooks while you’re in uniform, you’re probably leaving money on the table. Between public libraries, free apps, and the DoD’s own digital library, you can load your phone with weeks of listening without adding another subscription to your budget. “With one free library card and a couple of apps, you can turn every duty night, commute, and PCS road trip into reading time—without paying for another streaming service.” Here’s a simple,  step-by-step guide