For first-semester Engineering Mathematics, recommendations often include checking with professors for specific texts mandated for the course. A commonly suggested book is Stewart, known for its clear explanations and ample examples, making it suitable for beginners. Another option is Spivak, which is more advanced and assumes prior knowledge of calculus, focusing on fundamentals of analysis and proofs. While Spivak may not appeal to everyone, it has been well-received by those with a strong math background. The discussion emphasizes the importance of aligning book choices with the specific engineering discipline, in this case, Mechanical Engineering.