The book "Highly Sensitive Optical Receivers" by Kerstin Schneider offers a comprehensive analysis of the circuit design of optical receivers that use external photodiodes. It covers both continuous and burst-mode receivers and compares their characteristics. At the beginning, the fundamentals of III/V photodetectors, transistor and noise models, as well as bit error rate and sensitivity are explained. This introduction enables readers to better understand the circuits described in the main part of the book. Additionally, detailed descriptions of receivers for optical data communication, particularly optical burst-mode receivers in deep sub-micron CMOS technology, are provided. Numerous illustrative diagrams support the understanding of the complex topics.