The Goethe-Institut offers German teachers in Sweden class sets of a lot of different youth books and graphic novels with up to 20 copies. Most texts can be read at least in excerpts at level 3. Some titles are more suitable for advanced learners (levels 4 and 5).
In the download you will find the following book recommendations with a short description:
Tamara Bach: Sankt Irgendwas (B1-B2)
Tamara Bach: Vierzehn (B1-B2)
Tamara Bach: Marsmädchen (B1-B2)
Tamara Bach: Was vom Sommer übrig ist (B1)
Eva Dix: Goodbye, Lenin! (A2-B2)
Marion Döbert: Aus dem Nichts (A2-B2)
Arne Bellsdorf: Baby’s in black (B2)
Thomas Brussig: Am kürzeren Ende der Sonnenallee (B1)
Nadia Budde: Such dir was aus, aber beeil dich (A2-B1
Marion Döbert: Sophie Scholl: die letzten Tage (A2-B1)
Heiner Lünstedt / Ingrid Sabisch: Sophie Scholl: die letzten Tage (B1)
Corbeyran Horne: Die Verwandlung (Franz Kafka, B1)
Finn-Ole Heinrich: Die Taschen voll Wasser (B2)
Wolfgang Herrndorf: Tschick (A2-B1)
Reinhard Kleist: Der Traum von Olympia (Grafik Novel, B1-B2)
Reinhard Kleist: Berliner Mythen (B1-B2)
Rolf Lappert: Pampa Blues (B2)
Mawil Kinderland (Graphic novel, B1-B2)
Nils Mohl: Ich wäre tendentiell für ein Happy End (B1-B2)
Ursula Poznanski: Erebos (in einfacher Sprache A2-B1)
You can borrow the class sets for up to 2 months at a time and only have to pay the postage costs (when returning the books). Of course, you can also pick them up directly at the institute.