That is just adding value to their sale. If they can't give you a good lesson from a certified instructor, then ask for your money back. You can also take lessons at fishing shows and conclaves. Your regular assignments in this book are to go outside in a nonfishing setting and practice your casting. Practice on water, in the yard, at a park, or in a parking lot.
Pavement can be a bit hard on lines, but practice is more important than wear and tear.
My son, Geoff, blew up a 2-weight rod on a '92 Plymouth van. I know cars to beat rods every time. This book's flexible glue binding makes it easy to press the book open at a casting area you want to work on and place it open on a chair or stool for easy reference while practicing. Read the practice directions closely. You may want to invite a friend to practice with you so you can evaluate each other's form.