It's important to point out that you don't need a telescope to complete the lessons, but I still would recommend using one... it will enhance your experience and appreciation.
"40 Nights to Knowing the Sky" will help any adult learn more about the night sky and how to prepare for that first look through a telescope.
Each chapter is well written and easy to understand. The book has a lot of reference material, including pictures and drawings, to use well into the next century.
If you're beginning a hobby in amateur astronomy, this book will be a great addition to your library.