Hi 
  
I remember reading a book around 6 years while I was on holiday, the storyline basically revolved around an "Urban Explorer", someone who finds and explorers old buildings. 
If I recall correctly, in the book he was exploring an old hotel, I also recall there being someone who lived on the top floor in the penthouse suite who was unable to leave it because he had a disease, I think it may have been hemophilia. In the end he discovers that his wife was murdererd at this hotel, and I think theres something about some gold involved. 
  
It was an action/mystery novel. 
  
I've tried googling it but the vague description plus "urban explorer" turning up millions of results means I've had no luck. 
  
Hope you can help me as I would love to read this book again !