I got it, you are proud of your books. You have every right to be so. For God’s sake do not clutter up your sample book with the comments of reviewers about your previous books.
I downloaded your sample book. I took the first step. Then I flip through ONE HALF of the sample…YOUR chance to impress me, YOUR chance to get me to drop my hard earned dough, on people talking about your other books. I can, and more likely WILL, get those reviews off the internet or from the reviews other place: on blogs, Amazon.com, and on GoodReads. I do not need people wasting one half of your chance to snag my attention. When the sample is roughly 20 to 30 pages, two to five (!) are taken up by copyright, ISBN and “book designed by” (what does that mean anyway?) jargon and then you go and waste another three to seven pages of review snippets.
Well, you see where I am going. Some samples I get one chapter after all the mess to snag my attention. Sometimes I get five chapters. You do the math and figure out which book I will probably buy. This last one I just downloaded (I will not mention the book or author) I literally had one chapter amounting to a whole six pages after all the nonsense the silly publisher put in the front of the eBook. Buying this book? Doubtful.
Anyway, just my thoughts.