Meir Bar-Ilan, Words of Gad the Seer. Printed for the first time from Cambridge MS O0.1.20. Copied at Cochin, India in the 18th century. Israel: Shorashim, 2015.In Hebrew, with an English translation of the manuscript.The author sent me a copy a while ago and I've been meaning to mention it. Unfortunately, the book is not available on Amazon. The author is working on an introduction and translation of this text for volume 2 of the More Old Testament Pseudepigrapha Project. As noted today in an earlier post, the first volume, Old Testament Pseudepigrapha: More Noncanonical Scriptures, volume 1 (ed. Richard Bauckham, James R. Davila, and Alexander Panayotov), was published in 2013.
The Words of Gad the Seer has come up in past posts here and here. The text was inspired by the mention of a book with that title in 1 Chronicles 29:29-30, but it is not itself that book, if the latter ever existed as a separate work at all.