Help finding a very interesting book about alien invasion, please

In the 1990s, I checked out a book from my local library about an alien invasion. I think it was misfiled, because it was in the non-fiction section.

The book was designed in such as a way to make it look like a classified document that was transcribed. There were markings like "eyes only" and "classified" on it.Full of diagrams and black and white drawings, and fake military looking insignias.

In the book, several alien species were described.

The main bad guys were known as "The Blight", who were small creatures led by a queen. They had a weapon called a "Skeletal Disintegrator". They were supposedly susceptible to bacteria, demanded extreme cleanliness, and were very weak against high volume or intense sound waves. In the end, they were defeated by using a radio telescope to beam sound waves toward their fleet - and the technician in control accidentally inputted the late show or something instead of the intense sound developed by scientists, but it worked anyway.

They also controlled alien spies called the "Aerie" which were just like classical fairies, and they were a subjugated race.

During the tour of space described by the narrator, they flew past a steampunk ship piloted by the "Body Electric" race. The narrator also flew past the planet - get this - "V-8" inhabited by "mobile vegetable lifeforms". These two things were illustrated.

Thats all I can remember, It was was early 90s. It was very absurd, but id still like to find a copy!

Thanks if you can help me, and everyone have a good day!