While creating an eBook you will have to include the Table of Contents with the Titles, Chapters, and Page numbers listed clearly.
The key thing is to focus more on quality than quantity.
Having fewer pages that say more is always better than having a few dozen extra pages that say nothing.
Your intention is to offer high quality information and not go in for beautiful prose.
Readers are interested in learning something or solving some problem and not reading a book for reading sake.
The first thing to work on is the title.
This will of course depend on the niche for which you are writing.
The main title is also what determines the titles of the chapters in the book.
So the title of the book must appeal to the entire niche industry that you are targeting and the chapter titles must appeal to those looking for more details.
This is why selecting your niche is such a critical task.
If you pick the right one, the one in which you have considerable expertise, then you can come up with the title and chapter names easily as you are clear in what you wish to write.
Write down the title and the names and 1-2 sentence descriptions for 10 chapters.
Include an introduction and a closing and then all that is left to do is to expand on the descriptions for the 10 chapters and you are done.
Not all chapters will be of the same length so do not worry about that.
Write in short sentences using simple words and present ideas simplistically.