How the heck is Amazon classifying poker bestsellers? What category is it a subcategory of?

How can I find a list of the poker bestsellers on the Kindle? Does such a list even exist? And how often is the list updated, if at all?

It's under Lifestyle & Home. Poker is a subcategory of its own under that. I assume it's updated relatively frequently. I see Ed Miller's new release Playing the Player on the list.