The interactive app for the rock concept album "THE?BOOK" from the progressive crossover band "seven steps to the green door" brings together the music and story of the album in an unusual way. Experience the polarising story of the concept album in the role of the main character "Samuel" and escape the "empty room" by finding and opening the doors in the labyrinth in the right order. Discover the music and story (as ebook) and engage with an unusual progressive rock album...