language, but because the books often rhyme, and because he remembers how they're supposed to sound, he's able to figure it out. There is a whole new level of enjoyment for him in picking up a book because he wants to, and reading it without asking for help all the time. :)
Besides, who doesn't enjoy books that include lines such as:
Pajammy to the left.It just makes you smile!
Pajammy to the right.
(Jamma jamma jamma jamma P! J!)