Casagrande’s witty writing style – it is actually rather colloquial, that is refreshingly non-technical – lured me into buying her It Was the Best of Sentences, It Was the Worst of Sentences when I was browsing the shelves at a local Barnes & Noble. I guess, I would not have bought it online. And, I am not sure whether buying it was a good idea after all.
Casagrande tries to focus on sentences. Yet, her explanations often involve whole paragraphs that, in my opinion, are the more important fragments of a text. Yes, the sentence is an important building block. Yes, good grammar (her main point about good writing) helps to reader. And yes, most things she writes are right. Most, not all. Often she seems not to be really sure of herself and qualifies her statements. If she is not sure when she gives advice, how should her reader when he becomes a writer be sure about the best way to write a text?
Other texts on style and grammar do a better job. Look for example for the books by Williams and coauthors and Strunk and White’s Element of Style.