Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Treasure Trove for advanced theory on lin ear systems

This is definitely an outstanding book on linear time-varying systems. It contains a substantial amount of original work and results compiled in a compact way nowhere else to be found. The book is heavy on the theoretical side and not very close to applications. If You are searching for a book containing recipes for your every day problems - forget it. If search for a book that provides You with in depth descriptions on a mathematically challenging topic - You found it. A last note - in spite of the great contents it is a tough read, even for experts in the field. So beware and enjoy.