I wouldn't worry too much about the legality of this - anyone is free to publish a book about Freddie or anyone else, and it's already said that the book is fiction. I went to the website and listened to the fake rehearsal that of course doesn't feature Freddie.
I'm all for legends etc, but this seems a pointless book. You may have known Freddie in the mid-1960s and that's all very well, and there's a picture of you with Freddie, but so what. Freddie went to college and knew lots of people before he was famous.
He might have known you in 1965, but was he inviting you over for tea in 1975? 1985? Not really relevant to the forum.
Kudos for trying to advertise on what is becoming one of the most brutal forums on the whole internet though...
miraclesteinway