What type of ebook are you creating - exe format or PDF?
If it was exe, this is the one I have used & mentioned here in the past:
Ebook Starter is must-buy for anyone interested in creating their own EXE-FORMAT ebook. No matter what type of information you're offering, you'll easily find the perfect template for your project. Whether you're creating your ebook to sell or freely distribute, you won't find a better package to get you started.