“The aim of this book is to provide a solid foundation for researchers who wish to enter the field of D-finite functions. It offers a comprehensive and self-contained introduction to the theory, computation, and applications of D-finite functions, making it particularly valuable for researchers and graduate students. The book contains many illustrative examples to facilitate the reading of the book.” (Amir Hashemi, zbMATH 07756344, 2024) “The book is written in a precise style with attention to detail. The provided algorithms are in symbolic code, but can be easily (relatively) translated to programs. The exercises are well designed and informative. The book is an excellent source of information and will work best for graduate-level math education, though it may also motivate researchers to apply the theory in their own fields.” (Alexander Tzanov, Computing Reviews, March 27, 2024)