- eBookO Mundo de Quatuorian 1Cristina Pezel
- eBookO Mundo de Quatuorian 2Cristina Pezel
- eBookDie Welt Quatuorian - Band 2Cristina Pezel
- eBookDie Welt Quatuorian - Band 1Cristina Pezel
- eBookTétricos e metálicosCristina Pezel
- eBookSerien: O Mundo de QuatuorianCristina Pezel
- eBookSerien: Die Welt QuatuorianCristina Pezel