Can you write a sales letter that is very effective

I ? wrote an ebook that is a complete guide ? on how to find, buy and maintain lace wigs. It is really informative ebook and can used by anyone who has never used a lace wig, or just bought ? one. Also many hair dressers, salons will find it very formative. ? ? You must be able to show examples of sales letters that you have written. Remember that you are ? selling vanity and you must convince the reader that they need the guide before investing in a $400 wig. Also ? be the complete answer to hair loss and beauty and the getway to glamor and looking ? like a celebrity. Please see attached incomplete idea ? that I started on. thanks