Usps issue

I sold one of my text books on eBay last week sent it out on the 9th uploaded tweaking info. Today I got an email from the buyer saying we're is my pkg. so I check the tracking info on eBay and the last check point was in California I live in Arizona and the pkg was going to New York. So I type the tracking info in to USPS. Com and it showed attempted delivery to New York . I don't know what's going on any advice would be great.
 
She might have missed the tag to let her know they attempted delivery. I'm sure when she sees it's there, she will get it. I haven't heard about any book scammers, plus since you have dc, she can't claim INR.