Untitled AI art by @jandradefilho

I need a bookcover and back cover design that will serve as a standard for all books in a series. A design that will appeal to young adult readers and that will convey the main premises of the books: adventure and mystery, without images, using colors and elements that convey action and suspense, with creative graphics that will be visible on a bookstore shelf. The title of the initial book is OS CÓDIGOS SECRETOS and the author is JULIO DE ANDRADE FILHO and the call is UMA MENTE BRILHANTE É UM ENIGMA QUE PODE MUDAR TUDO