Maybe someone else would have bought one or more of those books while they were out on "unexpected loan"? Maybe, as someone else pointed out, they ordered repl

Maybe someone else would have bought one or more of those books while they were out on "unexpected loan"? Maybe, as someone else pointed out, they ordered replacement copies of the sold books unnecessarily. Maybe they made accounting decisions (employee bonuses, debt/supplier payments, etc) based on their assumed revenue that month, and now they have to deal with an unexpected shortfall? So many potential reasons why this isn't "zero effect". Not sure why you're trying so hard to talk away the impact of the "shitty move by the buyer" here.