Sefer HaYashar by Rabeinu Tam. [Constantinople, ca. 1515-1520]. Sefer Mussar, subdivided into 18 titles. Printed without a title page.
According to the "Hida," this composition was erroneously attributed to Rabeinu Tam in view of the fact that his Novellae and Responsum book is also titled "Sefer HaYashar." Rabbi Menachem Di Lunzano attributed the book to Rabbi Zerachiya the Greek whereas others attributed it erroneously to Rabbi Zerachiya Halevy, author of "HaMa'or." Others still attribute it to Rabeinu Yona Girodni. (See: Shem HaGedolim, Ma'arechet Gedolim 7, 13-14; Ma'arechet Sefarim 10, 72; Ya'ari, The Jewish Print in Constantinople, p.80, no. 79; Bibliography Institute CD, listing no. 0154914.) This truly rare item appears in the Bibliography Institute Database according to a copy extant in the British Library. No copy has ever before been offered at auction.
[40] leaves. 18 cm. Good-fair condition. Stains and some wear and tear to the edges. Adhesive tape stuck on the first leaf, no text omission. Untrimmed edges. Several glosses and inscriptions in a Yemenite hand, with an ownership inscription reading, "This book belongs to A. Netanel Ben Sa'id." Rebound.