Because it includes these beautiful pieces of prose:
The shelves were supposed to be loaded with books--but they were, of course, really doors: each book-lid opened as exciting as Alice putting her gold key in the lock. I spent days running in and out of other worlds like a time bandit, or a spy. I was as excited as I've ever been in my life, in that library: scoring new books the minute they came in; ordering books I'd heard of--then waiting, fevered, for them to arrive, like they were the word Christmas.
A library in the middle of a community is a cross between an emergency exit, a life raft and a festival. They are cathedrals of the mind; hospitals of the soul; theme parks of the imagination. On a cold, rainy island, they are the only sheltered public spaces where you are not a consumer, but a citizen, instead. A human with a brain and a heart and a desire to be uplifted, rather than a customer with a credit card and an inchoate "need" for "stuff." A mall--the shops--are places where your money makes the wealthy wealthier. But a library is where the wealthy's taxes pay for you to become a little more extraordinary, instead. A satisfying reversal. A balancing of the power.