Mommy and Daddy are invisible c-85 (paperback book, good second hand)
Alberto spends many hours alone at home. He has a snack, he does his homework, he watches TV... but the time is so long for him! His parents tell him that they have to work hard to pay for the beautiful house they have bought, but Alberto discovers that they are lying to him: in reality, his parents are two superheroes who can turn invisible and have incredible adventures every day! It has a Reading Game (No. 74), from the Efficient Reading collection.