This is a great introduction to (or a refresher on, if it has been a while) Wittgenstein. It is especially useful if you don't want to have to struggle through the Tractatus. Since he ultimately rejects the position he takes in that book, there is no substitute for reading the Investigations. However, this introduction could be a useful guide for someone reading the Investigations for the first time outside of a classroom setting.
Wittgenstein's work is complex and often requires careful study. The Tractatus was his earlier work, but he later changed his views. The Investigations is considered his more mature and influential work. Reading the Investigations can be challenging, especially without the guidance of a teacher or professor.
This introduction provides an overview of Wittgenstein's ideas and helps to clarify some of the key concepts. It can serve as a starting point for further exploration of his work. Whether you are new to Wittgenstein or need to refresh your memory, this introduction can be a valuable resource.