In the last 60 years, the use of the notion of category has led to a remarkable unification and simplification of mathematics. Conceptual Mathematics, Second Edition, introduces the concept of ’category’ for the learning, development, and use of mathematics, to both beginning students and general readers, and to practicing mathematical scientists. The treatment does not presuppose knowledge of specific fields, but rather develops, from basic definitions, such elementary categories as discrete dynamical systems and directed graphs; the fundamental ideas are then illuminated by examples in these categories.

《范畴论》作者在书中使用的是现代范畴论通用的概念和术语，但是在对一些基本概念和理论的处理过程中，作者尝试使用比较简洁直接的方法，避免烦琐的论述。《范畴论》的前3章是范畴论的基础内容，适合高年级本科生和研究生的教学以及科研人员对范畴论基础知识的需要，第4章可供从事代数拓扑学尤其是同调代数研究的研究生和科研人员学习和参考，第5章既可以为从事代数几何的科研人员参考，同时也可为希望进一步学习Topos理论的读者提供层论方面的预备知识。

《数学工作者必知的范畴学(第2版)》内容简介：This second edition of "Categories Work" adds two new chapters on topics of active interest. One is on symmetric monoidal categories and braided monoidal categories and the coherence theorems for them——items of interest in their own right and also in view of their use in string theory in quantum field theory. The second new chapter describes 2-categories and the higher-dimensional categories that have recently come into prominence. In addition, the bibliography has been expanded to cover some of the many other recent advances concerning categories.