I foung this book to be a very good reference for Allis Chamblers construction equiptment. While it contains little information on the AC farm tractors, this book covers nearly all of their construction equiptment. There are individual chapters for each type of equiptment, witha thoughle history of each modle. At the end of each chapter there are detailed specification sheets, as well as an apendix of serial numbers and years, so you can pinpoint your tractor's date of manufacture. The book goes gives a good history of the original company, as well as somewhat of a history of the major companies that AC bought, such as BUDA. The book also contains information on models of equiptment continued on into Fiat-Allis, such as the FA HD-31. The book covers all eqiptment, from the first early Monarch crawlers, all the way up to the giagantic HD-41's. There are chapters on industrial eqipyment, such as forklifts, and small crawlers, also inclued. If this author were to write another book like this, I would be first in line to buy it.