The Thrilling Adventures of Lovelace and Babbage:

The Thrilling Adventures of Lovelace and Babbage: The (Mostly) True Story of the First Computer by: Sydney Padua
Non-fiction: History, Graphic Novel, Sci-Fi, 315 pages
Physical Book Count: 8
Book Count: 14

The book starts with a graphic novel about the actual life of "Ada Lovelace" (as she was the countess of Lovelace, it wasn't her last name, also Ada wasn't her first name, but a middle name that she went by.) It then goes into a collection of stories about what could have been, if Ada hadn't died young and Babbage actually made his machine.  Also, they fight crime, which to them is street musicians and poets.  And it ends with actual historic writings by and about them and illustrations on what the plans for the first computer were at various times and how it would work.  Even in the middle section there are copious foot notes with information from the actual lives of the people involved, or on the math involved in a story.