In 2017, she made her debut as author with the book Lampje. For this book she won the Nienke van Hichtum-prijs, the Woutertje Pieterse Prijs and the Gouden Griffel.[3][4][5] Schaap is the first author to win the Woutertje Pieterse Prijs with a debut novel.[5] She became the second author to win these three awards for her book, Peter van Gestel being the first with his book Winterijs in 2001.[6] In 2018, Schaap also won the Boekenleeuw award for Lampje.[7][8] The book has been translated by Laura Watkinson into English as Lampie and the Children of the Sea. In 2020, the book was nominated for the Carnegie Medal award.[9][10] This was the first time a translated book was nominated for the award.[9][10]