Starting them on the first couple of Harry Potters should be fine. I remember reading the fourth in a day in fourth grade.
Lloyd Alexander should be a good author.
Brian Jaques writes books that are thick for kids, but your brother will probably love them since they have lots of fighting...
Passiveagressivenotes.com has a book, and notalwaysright.com does, too.
You might like asofterlife.com . It has several books, but with me just glancing at postsecret, I noticed some similarities.
Twilight and Stephenie Meyer.
She's a devout Mormon, and the more you know of the religion, the more you see that her book is riddled with it. And it's definitely a bad book.
My question is why would you want to read such books.
It will be compared to the two, no matter what you do. Everyone jumped on the vampire bandwagon after Twilight got uber-popular. Wizards, not so much, but Harry Potter has become THE wizard book.
But if you make it sufficiently different, people won't accuse you of copying. Well, some might...
If they were errors because they said organiZed, recogniZed, realiZed, they aren't errors. American English and British English are different, mostly in the spelling of some words. Color/colour is another example.
And it looks like there will be a sequel released soon... if not, he has other...