Package not arrived

Hi, I'm a new Ebay-er and Auction Sniper (love it!) and am looking for input regarding my not receiving a package.

I won an auction on 11/17 and paid for the item through PayPal on the 18th. To date, I have not received my item. I e-mailed the seller, who lives in Canada, and she said she mailed it as soon as she received payment. She also said that another book she'd mailed at the same time to another auction winner had already been received.

Assuming the seller mailed my item on 11/19, I'm willing to give it until the end of this week before I consider the item lost (I've received items from Europe that arrived within one week).

I don't think this seller is jerking me around but as I haven't experienced this situation before, I wanted to check with the experts as to the best protocol.

My questions are: am I allowing enough time before the item is considered lost (I received a package from the Netherlands within a week)? And, I'd like to get my money back. Is it appropriate to receive it all back or expect only a partial refund? She did not provide trackable shipping or insurance options so I had no choice but to accept snail mail. Here's the Ebay item number for reference: 3565671301.

Thanks for the help!