In the stack of books on my desk, there's one I borrowed from a friend. We'd been discussing weird and creepy fiction, years ago, when he handed me a collection of horror stories by Robert Aickman. A few weeks later, the world went into quarantine lockdown, and I found those chilling tales to be a much-needed escape from what amounted to a waking nightmare. Since then, I've meant to give the book back to him, but he has also assured me that it isn't urgent.
I'm similarly prone to lending books I don't necessarily expect back. Although, one time I did put out an APB on social media when I couldn't find my copy of some Hilton Als essays I wanted to revisit. The book came home within the week. Since then, I've developed a strategy of buying extra copies of favorite titles, so I'm better prepared to hand them out when the occasion arises.