Short and sweet, this little gem is better than any Cosmo quiz ever devised. At 96 pages, with a single sentence on each page, it still packs a wallop by reminding those of us who have voted in more than two presidential elections that we are not the cool dudes and chicks we used to be.

“It’s the first decade of the 2000s,” the back cover says. “Do you know where your brain is?” You may be living in a state of happy denial about your age and the consequent unhipness associated with it. If so, this book will either jolt you back to reality or blow your mind entirely, man.

If you can’t cope with the following examples from the book, just toddle back to your groovy rec room and put an LP on the stereo.

• “You are so 20th Century if… when you hear the phrase ‘American Idol,’ you think of somebody like John Glenn.”
• “You are so 20th Century if… the phrase ‘a pound of flesh’ makes you think of Shylock and not liposuction.”
• “You are so 20th Century if… you have more photos in albums than on your computer.”