This book is helpful more so for academics and for the corporate world (i.e. formal audiences) than for creative writers. However, some principles of style, such as using specific and concrete words (principle 6) and favoring active sentences (principle 11), can be helpful for creative writing as well. Albeit, the section on grammar rules is indispensable for all writers. Royal has another book (viz. The Little Gold Grammar Book) that details those rules in more detail, and it may be more useful for the creative writer to read that one instead.