I love this.
As someone who buys a lot of books I've often wondered about the previous owners. Sometimes you get a glimpse of them when you find a book with their names written on it.
Recently I've been gathering a collection of first edition/first print Goosebumps books and unsurprisingly they're a lot more likely to have markings on them than your average book (being targeted at 4th grade students).
One night I searched the internet for a few of the full names I found in the books just to see where the owners were today.
One of the first I turned up was an obituary for a woman that had died two years ago. It said she had a lifelong love of reading.