Sefer ha-yashar
Subtitle: le-Rabenu Tam baʻal ha-Tosafot
Publisher: Ḥayim Elʻazar Raikh
Published: 1992
Place of publication: Brooklyn
Language: heb
Number of pages: 28
Subjects: Jewish ethics; Repentance; Judaism
Work titles: Sefer ha-yashar (Ethical work)
Notes: Reprint. Originally published: Kraków, 1586.

Erroneously ascribed to Jacob ben Meir Tam.