Stumped about "affect" and "effect"? "Discrete" and "discreet"? "Lay" and "lie"? Is it "retroactive to" or "retroactive from"? This little book contains over 250 confusing words, word pairs, and idioms along with meanings and examples. Presented in alphabetical order for ease of use. You'll want to keep this little book handy. Ages 11 and up.