Ron Kessler author of In the President's Secret Service: Behind the Scenes With Agents in the Line of Fire and the Presidents They Protect has stuff about LBJ that I don't even want to repeat -- I've heard interviews with Mr. Kessler but I have not read the book.
As long as it just the "platform of Johnsanism" and not the personal habits of the thing then it could be much worse. I really believe that the Devil stood up out of respect when LBJ walked into Hell. And it did not take a book to convince me.. I remember LBJ.
When all is said & done, which will have been worse for the US, LBJ or BHO?