Talk about a title that's misleading...

Lincoln's Secret Spy: The Civil War Case That Changed the Future of Espionage - Jane Singer, John Stewart

It was immediately apparent that the main goal of Lincoln's Secret Spy was to prove that William Alvin Lloyd was absolutely not a spy. Even the end notes point out the flaws of previous works that believed this to be the case. Also, Lincoln was a peripheral figure and yet it was his picture on the cover of the book which I felt amounted to a kind of click bait for hardcovers. In fact, the authors pointed out that there were no likenesses of Lloyd on record which is why his picture is not included in the pictorial insert (although Google seems to disagree on this point). If you're not a fan of minute details about train travel then I doubt you would be a big fan of this book. I applaud the authors attention to detail but I found it to be both tedious and difficult to follow because of its overuse. I know that it can be difficult to jazz up historical subjects, especially those about little known figures, but it was a bit over the top in some sections where they compared the story to a play and the reader as an audience member (or something because I honestly felt confused about their main goal with the flowery language). I saw it through to the end mainly because I kept hoping that there would be some big revelation about Lloyd that was contradictory to the rest of the book and supported the claim that he was a spy (there wasn't). 

Source: http://readingfortheheckofit.blogspot.com