Reading Resources, Books in Portuguese

Hi, I’m reading some easy young teenager level ebooks on kindle / iBooks by Pedro Bandeira. They are eBooks because I can highlight any word and pull up the translation. They are fun adventure books, but are in Brazilian Portuguese and the Brazilians use a completely different style for their verbs and different colloquialisms. Just wondering if anyone has any suggestions for comparable books at that level in European Portuguese. I’ve tried translated adult books like Agatha Christie, John le Carre, but they are much more difficult, and pre-teen books are too boring. What books did you at Practice Portuguese love as kids or young teenagers? some derring do stuff… (sailing, adventure, discovery, mystery, Carlos Ruiz Zafon style, but easier than that…
Thanks for any tips
Actually I think question this should be transferred to the topic: Reading Resources, Books in Portuguese