This is an extremely enjoyable book on integration theory, contrasting with the "usual" teaching. Normally, after two years of college, the student is introduced to measure theory, the Borel coverings and its application to Lebesgues integration as a generalisation of Riemann integrals . The whole subject can be covered in 4 or 5 dry lessons. This is like going to McDonald to eat.
This book on the other hand is like going to a three star Michelin Restaurant where each small dish is prepared in order to fulfill the senses.
The book begins with Riemann integration and step by step introduces the difficulties people ran into trying to handle more complex functions, how they tried to overcome these issues, the advances and the dead ends. Theorems and definitions are introduced when needed during this journey and are always put into perspective. The book begins (as often) With Riemann around 1850, and soon the reader is faced with the intricacy of the Real numbers ; set theory, Cantor's work on cardinals, the continuum hypothesis are "discovered". Delicate functions escaping the intuition such as the SCVn or the Volterra function are studied in order to feel all the difficulties posed by Riemann Integrals. The author then brings us to the final steps, the Weirestrauss, Jordan, Borel and Lebesgues works which put a beautiful end to the revolutionary era covering 1850-1900. This journey takes the first ~ 200 pages of the book, the remaining is devoted to extensions and deepening of the concepts.
This is not a book on history of science, but one where the history of science is used as a pedagogical tool. I recommend it to people who are not impatient and have time for a real meal.