Unexpected package

On Friday afternoon I received an email from the Front Office letting me know that a packaged arrived for me.  I didn't check my email until after the office had closed so I was curious what was waiting for me.  I don't remember ordering anything and I had already received a package from home so I was not expecting a thing.  The office is closed all weekend so I rolled over there this afternoon before class.  The package was a small Amazon.com box.  I immediately wondered if a back ordered textbook had arrived because I thought that order was cancelled.  I opened it and inside were two short books.  Both books were about walking tours around the area that take you to some places of interest int he Bay Area.  The trails and paths are primarily in Berkeley and some in Oakland.  The books also includes recommendations for grabbing a bite to eat or a cup of coffee.  There are essays highlighting the history of the area and pointing out odd details and stories that most people don't know.  They look like really cool books and something to check out, but there is one problem.  I have no idea who sent it.  I called my mom to see if she sent them, but she had no idea.  So, I have these books and no clue who gave them to me.  Thank you, who ever you are, I am excited to go out and check out the trails.