UPDATE 6/2015: One of the prefaces and Two introductions that I wrote on the NYT Best Sellers list.
Only the intro or foreword is $5. I am a writer and a blogger. I am have written several successful ebooks and will write the preface or foreword for you. I have done a lot of ghost writing.
Why should you have a preface/introduction/foreword?
Foreword are a GREAT portion of your ebook to give away for free to sell.
To sell the book to the potential reader/buyer (lure them, hook them, make them want to read more).
To provide a framework for what's to follow — the hooks on which to hang the pegs of story details
Some people feel nobody reads the introduction; some people have said that it's important — it’s the first thing people look at. Obviously it should be done well, if the latter is true even some of the time, but some people skip it. Personally, I think it's important that everything in the book be interesting, because you never know where the reader will start, and you even want the ending to be good, so they leave feeling satisfied and you get good word of mouth. I tend to put acknowledgments at the back but try to make them interesting, to give them content.
Book / Ebook
Preface and Introduction
I will include a preface and introduction for the ebook