I really enjoyed the book of Lost Horizon; I'd say there's a high chance the book of Random Harvest will be good.

I should both see and re-read Lost Horizon; I have a video cassette somewhere around the house, and I think there's a paperback downstairs. I don't think it was the first movie I saw Ronald Colman in, but I haven't seen it more recently than high school.

Glad to hear the movie was such a treat!

I recommend it!