Get ratings and advice on businesses and services available in the Chicago metro area. Use Chicago Consumers’ Checkbook to find plumbers, roofers, doctors, dentists, and more. Note: After you enter your library card number the first time, you’ll complete a registration form with your name and address. Then, you’ll receive an activation link via email which will allow you to leave your own ratings and comments on local businesses and service providers. And once you complete this process, only your library card number will be needed in the future.