Book Five of the 39 Clues series came out on August 11. The Black Circle by Patrick Carman follows siblings Dan and Amy Cahill as they continue to follow clues left by their deceased grandmother. It would seem that these clues lead to unimagined wealth and power, but mostly they've been nothing but trouble and danger for Amy and Dan who were last spotted in Egypt. These books seem to be losing steam a bit. They are not flying off our shelves like they did at first. Anyone out there reading them? What do you think?