Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: UFO's? T4 bakteriophage is even better

Introduction to world of microorganisms. And it is a whole world with more marvels and revelations than the macro world. The book contains a lot of illustrations, but many of the color photographs are artificially colored and certainly not the newest. They had a lot of work to change the book from two to four colors and one can still see this. Maybe, their newest version: "Brock's Biology of Microorganisms", also available at amazon.com, corrects this. Besides it beeing a propper text book, the main highlights come from nature itself which offers such a vast morphological and functional diversity in the micro world. The chapters range from general cell biology through viruses, genetics, industrial microbiology, immunology, medical topics (diagnostics, epidemics, diseaes) to bacteria and archaea. It's nearly too many topics to have them all statisfactorly presented. But since I knew nothing of those topics at all, the book proofed to be quite benifactory to me.