Author Kyle Lukoff discusses two new picture books: Just What To Do, illus. by Hala Tahboub (Dial Books, July 16), about supporting loved ones through loss; and I'm Sorry You Got Mad, illus. by Julie Kwon (Dial Books, Aug. 23), "A master class in apologies and in storytelling through words and art" (starred review). Then our editors share their top picks in books for the week.