You might want to take 2 ibuprofen before starting Passion if you have a very vivid imagination. This book will make you sore in places you didn't think possible, organs of unknown origin will be nudged into oblivion? ecstasy? (I guess) and you may not be able to walk for several days.
If you like that sort of thing, and haven't read a lot of historical romances (because this plot line is just a regurgitation of the many, many others in that genre), than you will love this book!
I did not.