No matter what any POD publisher or marketing company tells you (even the traditional publishing houses) you, the author, are almost 100% the reason your book will sell.

It is your belief, excitement, enthusiasm, and energy that will get a reader excited about buying your book.

Publishers are certainly a vehicle by which you can communicate your passion to the rest of the world, but, for ANYTHING to happen you'll need to know a few things about yourself and your book - and be able to communicate them very clearly.

1 - What is your definition of success for your book?

Some authors write for themselves and their families only