The Church Handbook of Instructions is a set of 2 books which contain instructions for area leaders as they seek to “judge” their respective congregations. Judge might not be the appropriate word, but the basic meaning remains unchanged – the Church Handbook of Instructions is the guidepost used by area leaders across the globe as a way to help make decisions on matters of policy and even doctrine.
Most people give little thought to this book given that they rarely see one. These books, which are reserved for people in leadership positions, simply don't make the rounds in any given congregation. They are available at several sites like these:
Mormon Expression has an informative podcast done in 2011 on the current Handbook of Instructions released in 2010: Mormon Expression podcast 121