This book is an essential work for exploring rabbinic literature. Not only does it include a slough of important bibliographies for various topics throughout the Mishnah, Tosefta, PT, BT and Midrashim but it provides concise summaries of controversial and disputed aspects of various textual, historical and literary elements of all the above works. It provides a perfect summary for when you encounter a new particular rabbinic work (especially if it is Midrashim) and you can easily get up to date on various issues and particularities of the text in question.