As tweeted earlier last week, Prof. Brody of Hebrew University’s department of Talmud and Halakha has just published, along with Zvi Stampfer and Carmiel Cohen, a new edition of Otzar Ha-Geonim. Stay tuned for an in-depth review in the coming weeks, and, until then, check out the table of contents and introduction here. This new volume is part of a larger project, funded by the Israel Science Foundation, which will eventually fill in all the original volumes B.M. Lewin did not complete, as well as supplement the earlier volumes with more material.
And if you’re already calling the Ofek Institute or your preferred seforim store for a copy, you might want to think about asking them to save you a copy of Prof. Brody’s Teshuvot Rav Natronai Gaon, first published in 1994, and recently reissued in a brand new edition.