Bests & Worsts Reviews from Amazon

I'm very disappointed in this purchase and will be returning it. This is strictly a problem workbook with an answer key. Any instruction or lesson material must be in the online videos available to purchasers. One reason I chose this book was that it had so many 5-star reviews. When I received it, I couldn't figure WHY there were so many 5-star reviews until I looked at the bottom of the title page where the publisher/author offers a free gift in exchange for a 5-star review. All those 5-star reviews influenced my decision to purchase and I feel misled.