Has anyone read any of the books from the "Secret Series" by Pseudonymous Bosch
such as "If you're reading this, it's too late"
http://www.amazon.com/Youre-Reading-This-Late-Secret/dp/0316113689/ref=pd_sim_b_1

looks like an interesting series to read and wasn't sure what others thought and the appropriateness for a 6yo.