Index pages help you find the most relevant resources in our library on a given topic. With over a million textbooks available for you to read, it can be hard to know where to look first. Index curates our library based on niche areas of research and specific fields of study, simplifying the research process. We have used machine learning and natural language models to identify and pull through the most relevant and authoritative extracts in our catalog on a huge variety of subject areas. Our catalog is composed of textbooks, monographs and edited collections written by academic human experts. Each Index page highlights key research and excerpts from this collection.