The discussion centers on selecting the best introductory book on General Relativity (GR) among works by Bernard Schutz, David d'Inverno, and others. A participant expresses dissatisfaction with d'Inverno's treatment of tensor analysis, finding it insufficiently rigorous. The consensus suggests that most introductory GR texts provide only a basic overview of tensor analysis, which may not meet the needs of those seeking a deeper understanding. Recommendations for more rigorous resources include separate textbooks on tensor analysis and specific titles like O'Neill's and Straumann's works. Additionally, free lecture notes by Matthias Blau are mentioned as a valuable resource for learning GR. Overall, the conversation emphasizes the importance of finding a textbook that aligns with individual learning preferences and rigor requirements.