Ugh, yeah, this is complex. The second edition isn't going to be properly out for probably months. While it's online now and still undergoing some copy and technical editing, I'm not sure that sending you to the Amazon page for a pre-order months down the road is the best. It's hard to say though. :(
Huh, we'll have to fix that. You can find the pre-order for the 2nd edition if you search for it:
Noticed that the price is double the price of the 1st edition. Is that due to the number of authors doubling? ;)
Amazon pretty much sets the price themselves here, we have nothing to do with it (nor do we get paid differently if you buy it for $50 or $20). I believe generally Amazon (or any reseller) pays Apress about $15 per book, since that's what our royalties are based off of.