Ok, just from the size of the book, this isn't one for the casual reader. This also isn't one of those books I'd recommend to someone without a strong science background, preferably in biology or microbiology. The first couple of chapters that discuss the crucial experiment at the crux of this controversy are challenging to understand and that evidence will be referred to frequently throughout the text. So, if you're not comfortable with scientific terms or good at remembering them, there is a glossary in the back to jog your memory, but be prepared to read the first couple of chapters that cover the experiment more than once because you'll really want to understand the central argument before the barrage of people start marching all over the timeline.
Duly noted, if you can follow the science the scandal is amazing. I found it doubly interesting because I remember John Dingall campaigning in our area of Michigan in the 1990s when I was still in high school and didn't understand all the ruckus. Kevles account leaves no stone unturned either, so be prepared to sit through multiple accounts of testimony, evidence, and continually invented charges against Imannishi-Kari. Overall, not bad, but tends to tediousness.