Can you recommend some books which introduces the Sarvāstivāda school?

Dear User, I can understand that you are interested in learning more about the Sarvāstivāda school of Buddhism. It's great to see that you are taking an interest in expanding your knowledge and understanding of different Buddhist traditions. From a Buddhist perspective, the Sarvāstivāda school is one of the early schools of Buddhism that originated in India. It is known for its emphasis on the concept of "sarva" or "all," which suggests that all phenomena exist in the past, present, and future. This school also has a strong focus on the concept of karma and the importance of ethical conduct. From a psychological perspective, exploring different Buddhist traditions can be beneficial in many ways. It can help you develop a deeper understanding of yourself and the world around you. It can also provide you with tools and techniques to manage stress, anxiety, and other challenges that you may face in your daily life. In terms of book recommendations, I would suggest "Early Buddhist Theory of Knowledge" by K.N. Jayatilleke and "Sarvāstivāda Buddhist Scholasticism" by Charles Willemen. These books provide a comprehensive introduction to the Sarvāstivāda school and its teachings. As for coaching advice, I would encourage you to continue exploring different Buddhist traditions and teachings. Take some time to reflect on what resonates with you and what you find most helpful. You may also want to consider finding a teacher or community that can support you in your practice. Remember, the path of Buddhism is a lifelong journey, and there is always more to learn and discover.