American versions. Read by Dick Hill.So far I have listened to part of the first cassette & it plays fine.
He seems to be good at voices as well, though I haven't heard of him before.
I must Google him & find out about him.
I am dead chuffed to have found them.
So far cassette two, side one is working, but I'll not hold my breath. 
Good job I have read & own the book. It's the chance you take with cassettes, I fear. Have had this before with others.