chapter book
US /ˈtʃæp.tər bʊk/
UK /ˈtʃæp.tər bʊk/

1.
Kapitelbuch
a book for children that has chapters but is not as long or complex as a novel for adults
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My daughter just started reading her first chapter book.
Meine Tochter hat gerade angefangen, ihr erstes Kapitelbuch zu lesen.
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Many popular children's series are written as chapter books.
Viele beliebte Kinderbuchreihen sind als Kapitelbücher geschrieben.