The book "Waldemar Maciszewski" provides a comprehensive overview of the life and career of the Polish pianist and composer Waldemar Maciszewski, who lived from 1927 to 1956. It is primarily based on articles from Wikipedia and other free online sources. Maciszewski was born in Warsaw and received his musical education during World War II at the underground Warsaw Conservatory as well as at the State Music Academy in Krakow. He was a talented pianist who received accolades at several prestigious competitions, including the Fryderyk Chopin Competition and the Johann Sebastian Bach Competition. In addition to his classical career, he was also active as a jazz musician and composed a variety of works, including concertinos, suites, and music for theater and radio. Tragically, he passed away at the age of 29.