There's really not much to say about this. It's a short, straight forward tale of the life of Hoover with a focus, of course, on his years as head of the FBI. The tone is dispassionate, a mere list of facts in the shape of a straight narrative. The illustrations may take up a greater percentage of the pages, but the text is definitely in the center of focus, the illustrations are accompanying the text, even though it's in comic form. Speaking of the illustrations, they are okay, but not good, drawn by someone competent enough to compose scenes, but not skilled enough to create art, good enough so that when a famous face such as that of JFK or Nixon appears, it can be recognized with the help of the text telling the reader who it is supposed to be (and on some occasions, the likeness is of a high enough degree that the text would not be necessary), but not good enough to really capture the character of the persons, or for that matter bring life into the faces of any of the characters, famous or not.
In any case, leaving aside the half-bad illustrations, the text is fine, it works, it's informative, but nothing more than that. For someone like me who did not know a lot about Hoover before, it constitutes a good short overview (under the assumption that it is accurate, of which I can of course not be a judge), kind of like reading a Wikipedia article full of kind of bad illustrations (there I go again...) Worth a read, but not really recommended with any enthusiasm.