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NEW YORK — 90-square-feet is small.

But it gave author and professional organizer Felice Cohen a big idea.

Her book comes out next week. It’s called “90 Lessons for Living Large in 90 Square Feet.”

Cohen says she makes the most of vertical space in her new one-bedroom apartment.

Even though it’s about five times the size of her old one, she doesn’t let clutter start building up.