Platypus, ah, that's interesting. We usually read these easy books for 5 minutes at bedtime and he's clearly bored and tired so it's hard for me to tell how many of the mistakes are 'real' and how many are because he's being silly. We also end up repeating the same stories a lot because he doesn't switch guided reading books often so he's much more engaged with his new harder material. When I tell him to slow down and read every word on the page he tends to get them. I'm gonna go get the AAR and AAS books today if they're in our local store.