We have been working on potty training with our 2 1/2 year old for two months now, and I am now looking for a more substantial book. (pottytrainingconcepts.com)
These authors found an audience, built an author platform and garnered substantial book sales. (bookcovercafe.com)
I once read a great piece of writing advice that said if you write one page per day you'll have a 365 - page book in a year — that's a pretty substantial book! (blog.balboapress.com)