Grandpa died, book with codes

So my grandpa died a week ago and my sis and I are helping my mom move his stuff into boxes and throw away some stuff, I came across his suitcase and there were many picture books and stuff and one of them has a bunch of codes that look like the wallet crypto codes when I Google them, how do I get into them?

My grandpa was never rich so I don't expect much, but I am curious, hoping to get an answer soon because my mom still haven't emptied out the trash bin outside, so if I have to look for something else that is needed to access these codes, now is the time, trash gets emptied 22 March

Update 1: My sister and I gathered the electronics. We also searched every book and suitcase for any other important looking things, all we found were family pictures.

We put everything in a box and it's in our closet for now, we haven't told our mom yet because we aren't sure if it has anything, besides she is the type to give the money away to help people and the rest of the family, even though they are mean to us because of the breakup, so if it has anything inside my sis and I will keep it a secret until we are older.

Right now we have to go to school, we read all the comments, so thanks for the advice and suggestions, will be doing them when back home.

Btw the electronics don't seem to work, not sure if I should throw them out