I am disappointed in this art book. I do not think the people who made it understand the medium it is attempting to present.
Basically: it is using extremely artifacted, obviously rendered on a LCD screen "screenshots" to present the artwork of this game.
This is disappointing because it does not look very good, and is not in the format the sprites in Metal Slug were intended to be seen. These sprites were drawn on, and rendered on, crt monitors. They were not jagged sprites, they looked AMAZING in their original format. And that is not captured in this book.
This should have been high quality photographs of a high quality CRT screen. Instead, we got jagged screenshots from an emulator.
A book that covers the entire metal slug videogame history with interviews of the developers and tonnes of art and screenshot. Only thing preventing it from going 5 stars, is the obvious unspoken tension that the first three metal slug games are considered superior that what follows. It never seem to make peace with that