I agree with Patricia Rinadli's review there are errors in this book. If the book is examined carefully, you will discover that the author requested information for his book from many different places. In Eaton Co. the library helped him. While I am sure that the people who supplied the information for this book thought that they were accurate, I have been using it to help me develop a list of all of the communities that existed in Eaton Co. and have found many inaccuracies for Eaton Co. One was about the real name for the small community of Needmore which was very suitably named... I eventually found a map published by the Eaton County Bicentennial Commission in 1976 which can still be purchased at the old county building in Charlotte, MI which solved the mystery.
Never the less this is a valuable resource for Michigan history buffs, genealogist and stamp collectors who specialize in covers. The book discusses the history of various post offices that were in existence in Michigan. Nothing can take the place of original research, but then not everyone has the time, neither do they have access to all the resources they need and must rely on other sources or people. Relying on the internet for correct information does not always give accurate information. Using your local library and asking for help from the reference librarian can usually give you the most accurate information.