This is an excellent resource for any P-61 model kit. I've gotten into the habit of ordering a Squadron Signal book for every model I put together. This book detailed the fighter from inception, to experimental models, to full production models, to evolution to newer aircraft. There are pictures of the Black Widow in action as well as ground crew servicing it. The pictures are very detailed and offer clues how to take it up a notch when putting it together. My only complaint is that nearly all of the photo's are black and white. Color would be better. It's hard to accurately paint a gun bay or cockpit with only a black and white resource. Despite that, it's still an excellent resource.