My 2018 book, The Iowa State Constitution, is available (at very different prices) from Oxford University Press and Amazon. Part One provides an overview of the Iowa Constitution's origins and evolution. Part Two (the bulk of the book) turns to the history and meaning of each of the constitution's provisions. A brief bibliographic essay then introduces readers to the many resources available to those studying the Iowa Constitution.
UPDATES: The book's account of judicial rulings is current through September 27, 2017. I frequently post updates here to take account of new rulings and other developments as they occur.