Sefer Yetsira (Book of Formation/Book of Creation) is attributed to Abraham the Patriarch.
The historical origin of the Sefer Yetzirah was placed by Reitzenstein (Poimandres, p. 291) in the 2nd century BCE. According to Christopher P. Benton, the Hebrew grammatical form places its origin closer to the period of the Mishna, around the 2nd century CE.
I didn't find many questions about it and on Wiki it's saying that modern scholars haven't reached consensus on the question of its origins. Secondly there is no tag for it and searching for 'Yetsira' on the site doesn't show any results. Are questions based on that book on-topic? If not, why?