I had a friend who found comfort in Winnie the Pooh. The books, actually anything related to Winnie the Pooh. Stuffed Winnie the Pooh, Eeyore, Piglet, Tigger. OMG, Winnie the Pooh china.
My go-tos are the P.G. Wodehouse novels. I have yet to figure out why I find them so engrossing. But they whisk me away from the stressors of the day and put me in a world where all the problems are significant to the characters but hilarious to the reader.