From their press release:
Brill, the international scholarly publisher, has launched a groundbreaking Major Reference Work for the study of textual history of the Jewish Bible and the Christian Old Testament: Textual History of the Bible. It aims to bring together all available information regarding the textual history, textual character, translation techniques, manuscripts, and the importance of each textual witness for each book of the Hebrew Bible, including its deuterocanonical scriptures. In addition, it includes entries on the history of research, the editorial histories, as well as its auxiliary fields such a papyrology, codicology, and linguistics. THB is an excellent starting point for text-critical analysis of all biblical versions and books, as it offers the reader information about all the textual evidence for a specific biblical book and all the evidence for a specific textual source in one reference work.
See their page on it here.