Hello, thank you for reaching out. I understand your search for a comprehensive cosmology reference guide. The two books you mentioned, Principles of Physical Cosmology by Peebles and Cosmological Physics by Peacock, are indeed well-known and widely used in the field of cosmology. However, as you mentioned, the reviews on Amazon may not be very enthusiastic. It is important to note that every book will have its own strengths and weaknesses, and what may not work for one reader may be perfect for another.
In addition to those two books, I would also suggest looking into "The Cosmic Perspective" by Bennett, Donahue, Schneider, and Voit. It is a highly regarded textbook that covers a wide range of topics in cosmology, including recent developments and discoveries. It also includes numerous diagrams and visuals to aid in understanding concepts without relying heavily on formulas.
Another book that may be of interest is "Cosmology" by Steven Weinberg, a Nobel Prize-winning physicist. It is a bit more technical than the previous suggestion, but it provides a comprehensive and in-depth look at the subject.
Lastly, I would recommend checking out online resources such as NASA's website, which offers a wealth of information and resources on cosmology. There are also various online courses and lectures available from universities and institutions that could serve as a comprehensive guide to cosmology.
I hope these suggestions help in your search for a comprehensive cosmology reference guide. Remember to consider your own learning style and preferences when choosing a book or resource. Best of luck in your studies!