Very informative which I appreciate and I found it all very well explained when he was focusing on facts, but I found the actual way this book was written to be very annoying and I hated everything he added to those facts and it made the book a nightmare to read. I particularly hate it when in nonfiction authors add entire fictional stories of people who may or may not have existed, what jobs those imaginary people had, what they thought, what they said, their personalities and their clothing etc etc. and here half of the AIDS part was like that and it was a struggle to get through