Under, Over, By the Clover: What Is a Preposition? (Words Are CATegorical ®)

Dearly, Nearly, Insincerely: What Is An Adverb? (Words Are Categorical)

I and You and Don't Forget Who: What Is a Pronoun? (Words Are Categorical)

But and For, Yet and Nor: What Is a Conjunction? (Words Are Categorical)

Hairy, Scary, Ordinary: What Is an Adjective? (Words Are Categorical)

A Mink, a Fink, a Skating Rink: What is a Noun? (Words Are Categorical)

I'm and Won't, They're and Don't: What's a Contraction? (Words Are Categorical R) (Words Are Categorical (Paperback))

To Root, to Toot, to Parachute: What Is a Verb? (Words are Categorical)

How Much Can a Bare Bear Bear?: What Are Homonyms and Homophones? (Words Are Categorical)

Pitch and Throw, Grasp and Know (Words Are CATegorical)

Cool! Whoa! Ah and Oh!: What Is an Interjection? (Words Are Categorical) (Words Are Categorical (Paperback))