The third edition of the book 'Think Python' by Allen B. Downey is now available, featuring Jupyter notebooks that allow readers to read, run code, and work on exercises in one place. The book is an introduction to Python for beginners and covers various topics, including programming concepts, data structures, and file handling. The new edition includes more exercises, revised text, and suggestions for using tools like ChatGPT and Colab AI to learn more. The book is available in print and ebook formats from various online retailers.