unable to search after most books

When i search after books nothing shows up, i have tried both the app and website. i went through approximately 60 books where only 2 of them were found by the system. This wouldnt normally alarm me, but i got to a book i already have in the catalog and somehow i cant find it now. This happened 14.08 and has continued today.

Where are you looking? Site search? Searching your catalog? The add books page (if so, what source are you using)?

Can you provide an example?

If you can answer the questions posted at >2 lilithcat: this will help, thanks!

Closing.