The Random House Thesaurus
This book is awesome because it gives you lots of new words to use and makes you feel way smarter just by replacing your normal words with new ones. Plus, if you read it at night, it will help you go to sleep. Here’s that exact same review after using the thesaurus: This compendium is splendiferous because it’s resplendent with unique and obscure terms that make you appear more quick-witted and scintillating than the platitudinous being from which you secretly wish to abscond. Moreover, it offers desultory respite from insomnolence.
Get it from Amazon, $5.99