In this segment from Tuesday's Investor Beat, Motley Fool analysts Morgan Housel and Mike Olsen each discuss one stock popping up on their radar this week. Mike looks at the curiosity that is (NASDAQ:AMZN), the behemoth that defies all prediction of how big it can one day get. Meanwhile, Morgan points out that at just around 1.3 times book value, Berkshire Hathaway (NYSE:BRK-B) is one of the last places investors can go for value on the market today.