I just got the audio book of the Hobbit, narrated by Rob Inglis, and I would like to read the book while listening. Though, as I understand it, there are several different versions of The Hobbit (not sure how big the changes are), so I was wondering which version Rob Inglis used for his audio book. I still need to get the book, so I might as well get the version that fits my audio book best.
According to Wikipedia, the second edition had few but significant changes. Subsequent versions had minor emendations (see http://en.wikipedia.org/wiki/The_Hobbit). Web searches reveal a plethora of info but no place that I could find that actually details just the changes / dates of Tolkien's 'editions' (as opposed to publication editions which can be textually the same but differ in artwork, maps, etc.). The Wiki does briefly discuss Tolkiens changes. Since Tolkien died in 1973 and Inglis recorded the audio in the 1990's, I would think it's a safe assumption that he used the last version output by Tolkien. Only way to know for sure would be to contact him. If you were to discover he used an older version, how would you get a copy anyway ? You may want to consider getting a copy of 'The Annotated Hobbit' which has an appendix detailing the textual changes across the revisions.