For those interested in the textual history of the Hebrew Bible, I would recommend these two great books, from which I learn a great deal:
1. Ernst Würthwein and Alexander Achilles Fischer, The Text of the Old Testament: An Introduction to the Biblia Hebraica (3rd ed.; trans. Erroll F. Rhodes; Grand Rapids: Eerdmans: 2014).
This is an awesome introduction to the extant textual witnesses of the Hebrew Bible, including the Masoretic Text, the Septuagint, the Dead Sea Scrolls, the Samaritan Pentateuch, etc.). The book, which is a revised expansion on Würthwein’s fifth edition published in 1988, gives a clear and systematic explanation of the differences among these textual witnesses, and thus stresses the importance of textual criticism to reconstruct the historical development of the Hebrew Bible. As the author(s) write: “Textual criticism is the doorway to exegesis, and there is no back door. It is all too rarely observed that neither the church nor scholarship possesses a single biblical text, but only a copy that has been transmitted through a particular historical tradition. As a consequence the text not only provides the basis for interpretation, but the text itself is subject to historical study” (p.157).
2. Emanuel Tov, Textual Criticism of the Hebrew Bible (2nd rev. ed.; Minneapolis: Fortress Press, 2001).
The framework and a lot of ideas in the foregoing book are also reflected in this monograph, which was first published in Hebrew in 1989 and has become like the “Bible” in the field of textual criticism. Currently, I only have the second revised edition. This monograph contains much more concrete and detailed background information about various manuscripts and translations of the Hebrew Bible. Particularly useful is chapter 3, which features different scholarly approaches to grapple with the textual variants. In the rest of the book, the author then makes use of concrete biblical examples to surmise and explain how different types of textual variants came about. Throughout the book, the author has demonstrated his encyclopaedic knowledge of biblical texts. The content of the book is dense and requires careful reading, but the outcome of learning this book would be rewarding.