According to Vogel's Textbook Evaluation Scale, a textbook is scored across 10 established educational and structural criteria to objectively assess its quality.
Vogel's Standard Criteria:
Organisation of the content (Ensures logical progression)
Mechanical appearance (Physical quality, layout, and binding)
Illustrations used (Clear diagrams, charts, and visual aids)
Author's qualifications (Credibility and academic expertise)
Accuracy and presentation of content
Readability and adaptability
Teaching aids
While the qualifications and credentials of the author matter, external commercial aspects like publicity or fame of the author hold no weight in determining the pedagogical value of a textbook.