“The library is the worst group of people ever assembled in history. They're mean, conniving, rude, and extremely well-read, which makes them dangerous.” ― Leslie Knope tags: dangerous , libraries , library 161 likes Like “Every little thing about you can be a weapon, if you're clever enough.” ― Courtney Summers, Sadie. Quotes from Deep and Dark and Dangerous (A Ghost Story) Mary Downing Hahn · 192 pages Rating: (14.5K votes) Get the book “The water is DEEP AND DARK AND DANGEROUS” ― Mary Downing Hahn, quote from Deep and Dark and Dangerous (A Ghost Story) Copy text “To everyone who enjoys ghost stories”.