The present article offers a methodological critique of The Earliest Biographies of the Prophet and Their Authors by Horovitz, a German orientalist. Regarded as one of the classic and influential works in the field of prophetic biography historiography within the Western academic tradition, the book systematically examines the earliest transmitters and compilers of Maghāzī literature up to the third century AH. The research employs inductive, analytical, and critical methods, structured around the distinction between external critique and internal critique. The findings indicate that the book suffers from several methodological shortcomings, including: reliance on nonspecialized sources, citing isolated reports to establish authorship, unwarranted generalizations about the compositional method of all Sīrah works, conceptual errors in defining "Maghāzī" and conflating it with "Sīrah," and the blending of ḥadīth, Sīrah, and tafsīr sources without regard to their differing evaluative criteria. Furthermore, the author's approach in presenting biographical reports is accompanied by unfounded motivereading and moral disparagement of transmitters, often based on isolated quotations or weak sources. Although these findings cannot be generalized to the entirety of German orientalism, the work in question exhibits a selective approach influenced by the presuppositions of earlier orientalists, particularly Goldziher.