function theme_amazon_block($selected_book) questions

Issue Summary

I've been hacking away at this function in amazon.module, in attempts to get this random block to link to the node, rather than jump to the amazon.com website.

I commented out both the 'if ($is_review) statement' and the 'else' values. This does change the link to the node, except it can't seem to determine the node, which I don't understand. Isn't each amazon item stored as a node, as in 'if (isset($selected_book->nid))' should be true all the time?

Can anyone clear this up for me? Essentially I always want this random image to point to the local node, and never to the amazon website.

Brad