This is probably the easiest pick for me - It's Bill Bryson's memoir The Life and Times of The Thunderbolt Kid.
It's an account of Bryson's childhood in 50's Iowa - it's a lot like the good bits of Stephen King's IT, but without the clowns proffering balloons from storm drains.
When the cat I had before Wren was dying, it's the book I read while I sat next to her to see if the final treatment the Vet had given her would do any good. It's the book I finished the following day after it hadn't. It cheered me up then. It would cheer me up now.