Discover the daring and magical story of Marco and his friends as they embark on a new school year. Their final year of primary school holds endless surprises.  Some of these are great fun, others less so. Spirits, wizards, trolls, zombies and vampires try to disrupt Álex, Marco, Estrella, Cristina and Gonzalo's daily lives. However, this time an even more powerful enemy is watching them from the shadows. Will Marco and his friends manage to unravel the extremely mysterious mysteries that them? Will they be able to find out the secret of their true magic? Watch out!!!! If you read this book before you go to sleep, don't forget to check under your pillow the next day. And, most of all, remember that things aren't always what they seem.