My previous experience working at a library and a brief web search leads me to believe 26 checkouts is significantly above average for a hardback lifespan.
For ebooks there's this:
> Macmillan’s claim of only making $1.15 per book is incredibly misleading, Potash argued. “Seventy-nine percent expired and were removed from library catalogs because the two-year limit occurred first—not because they were checked out 52 times,” he said. In reality, the average is about 11.5 lends. According to Potash, the cost to the library is $6.07 every time someone borrows a Macmillan book.[1]
[1] https://www.vice.com/en/article/pa78wv/one-of-americas-large...
One thing I dislike about library ebooks is how thin the selection is. It should be trivial for the publisher to offer every ebook ever published. It's insane that they felt the need to port the concept of scarcity to the digital world. ebooks should have something like the compulsory licensing system used for songs.