The Secret of the crystal cave (Planetary wars Book 1)

When the bravest warriors of the planet Mruets embark on a voyage to find out the universe's most powerful weapon, the adventure takes many turns. Each clue leads to ore intrigues, more puzzles, and battles with vile birds and strange creatures. Do they finally find the Thunder storm, the deadliest weapon? Hop on their spaceship to discover strange lands and taste the adventure of the fantastic world of palaces, volcanoes and crystal caves.