I have always highlighted and underlined sentences I like in books. Another writer once told me they loved reading after me because when they turned the page and saw something highlighted, it excited them. They knew a good sentence was coming. I don’t know if anyone would want to read my copy of Pilgrims by Devin Kelly, however. A little squiggle or star or swipe of yellow here and there isn’t a nuisance. But when damn near every sentence is marked up and circled with a yes! next to it, it becomes less charming and more like vandalism.