The collections include a Young Adult eLibrary.
Its books are categorized by up to four readability indicators: Interest Levels, ATOS levels, Lexile Measures and Text Difficulty. For example, Harry Potter and the Philosopher’s Stone has an ATOS level of 6, while Puddin’ is at 4.9.
(How reliable and useful these indicators are is debatable.)
You need a library card number and PIN to sign in. Joining Norfolk Libraries is free.