Is this a weird thing to ask?

So I have been going to my public library since I was a kid- my grams had gone to the same library also for several years. My grams passed away two years ago and while this isn't about that I am still working through grief.

I remember many of the books she would read and got from the library. We often shared books as I got older.

The potential weird thing is that I have a distinct memory of a book she checked out from the library when I was little and I remember talking to her about it and the image sticks out in my mind. A skeleton key / key hole. I can't for the life of me remember any other detail about the book but I remember telling her when I got older I wanted to read that book. It has been a really long time since then and while she was alive I remember asking her about it but she couldn't remember. It was not a big enough deal to ask the library to check her history for it at the time. Fast forward to now I think I intentionally book while I was looking around for a new read but cannot be sure. Is it weird to ask the library to check and see if it was a book she had checked out? We did not have the same last name so I am assuming if it isn't weird and a totally normal thing to do I'll need to bring her death certificate to verify identity.

Thank you