Clarification of ISBNs and Ebook continued

I called Bowker, the company from whom I will buy my ISBNs.  Bowker told me today that my ten ISBNs will wait for me. I do not have to pay an annual fee. For publishers who buy a multitude of ISBNs there is an option of accessing a spreadsheet including all their ISBNs. There is an annual fee for this spreadsheet.  For ten ISBNs no spreadsheet is needed. Since I know I will need two ISBNs, I decided to buy ten as two are the same price as ten.

My book is in final review. I hope to format my book in some generic file so that I can prepare a version for each of the ebook platforms. I wrote my book in HTML, inserted it into Open Office and saved it in the format preferred by each of my reviewers.

Because I wanted to write at the most generic level and hate to do any kind of formatting,  I rather insert style via  codes in my word processor than have to delete extraneous code from my document.

Fixing extraneous code is labor intensive!

I wrote my book in the most simple, generic HTML. I limited myself to the opening and closing tags, no font tags included. Formatting codes will be added to my simple document in Open Office.