Here's what the Wonderful Blog of Oz had to say about the first book in the Lost in Oz trilogy!
And finally, an old-fashioned Oz book again, with Lost in Oz by Joshua Patrick Dudley. Hoo boy, how can I be kind to this one? It's a definite Mary Sue situation, in that the main character is Joshua Patrick Dudley himself, and he's lost in Oz with his twin sister and two best friends. Also, he sets himself up to fulfill a prophecy, but how he gets there would really tick off a lot of Oz fans. He knows the books, even though the Joshua in the book only knows The Movie, but not terribly well, in my opinion. The characters, by the way, are not only lost in Oz, they're lost in The Wonderful Wizard of Oz, the book, and in their attempts to get home, they find Dorothy, the Scarecrow, the Tin woodman, and the Cowardly Lion (and Toto, too!) — and end up getting incorporated into and changing the story! It's a good thing they have a copy of the book with them so they can see what's going on. There is a second book, which I've ordered, so we'll see if changing Oz history is going to have any consequences, or if a parrot-ox is going to help sort things out.
Although the reviewer is weary of the fact that the author is the main character, it sounds a whole lot like he liked the book and is even excited for the sequel!!