Illustrated book written by Amaranta Leyva published by Penguin Random House Publishing Group.
"Is it hard to be a superhero? Not much. Azul and Ali only have to rescue the magical Es-laim (before they must understand who it is), travel to the Island of the unicorns, discover and master all its powers (including the invisibility spell), and above all, face the baddest girl in school. Oh, and they have to achieve all this before their birthday. Azul and Ali are more than friends, they are Best Friends Forever, and as such they share everything, even birthday celebrations. Although this year their plans may not turn out as they would like, among other things, because Ali's mom insists on seeing them as princesses, and she doesn't understand that they are something much better: they are superheroines (well, they are just learning to be)"
