My childhood friend turned out to be the archive spirit, and they still want to read together.

Rento woke up with a spellbook under his arm and no memory of how he got there. The first time he opened it, the page became a road, and he stepped into a world where books were places and missing lines could kill people. He had to act useful fast, so he took work as an archive runner, a forest guide, and a thief of facts no one wanted named. That made him good at surviving. It also put him near the people who had burned the wrong books for the right reasons. The one person who kept him steady was the girl who knew his hands shook when he lied. She also knew where the cup should have been broken.