How I Went From Bad to Verse (Zack Files, Bk. 20)

Roses are red, Violets are blue, Zack can't stop rhyming; Now what will he do? Zack goes on a class trip, gets an insect bite, and suddenly can't speak a single word that isn't in rhyme. Talking like a modern-day Shakespeare may be fun at first, but not when you can't turn it off! What could be verse? How did this happen? And how can Zack make it stop?