The Consultative Selling: The Hanan Formula for High-Margin Sales at High Levels, 7th Edition by Mack Hanan is mainly targeting sales representatives to provide a specific and consistently successful approach and techniques for better sales.
I read the book and I found that it very helpful and useful for sales representatives.
Personally, I have met a lot of salespeople who are selling without knowing anything about the customer needs, challenges or strategies and they are selling products features without presenting the true added value of these products. I think you may have faced the same, especially with the infrastructure and equipment vendors.
The book offers some useful techniques and tips to enhance the selling process and make it value driven process to both customer and the seller. I think most of the big companies are using similar approaches and techniques mentioned in the book with different flavors.
I tried to summarize the key points which I think they are important to others while I do recommend to read this book. Here are the key lessons I learned from this book