Most writing books on the subject offer information you don’t need (for example an entire chapter on self-publishing) or are too brief in their help (one paragraph on creating characters).
These titles are a single source that put all of the good advice together on a specific topic in the various categories.
The simple concept is that you can dip into whichever ones suit your needs – and save money where you don’t need to spend it. By following the tips that follow, you’ll find submitting a manuscript comes naturally to you and your saleability will improve as a result.