Once there was a time when humans and aliens lived separated from each other.

Now, soccer has united them.

Team Earth has made it all the way to the finals. The winner of the Solar System Championship will be determined on Mercury where the aliens are made of rock. Great challenges lie ahead. Ronni-Romario and his team mates will need to make full use of all of their soccer skills. Do they stand a chance against the stone giants of Mercury?

Ronni-Romario and the Soccer Planets - Mercury Versus Earth is the fourth book in a space adventure series about soccer, team spirit and friendship.

Ronni-Romario and the Soccer Planets are the coolest soccer books in the universe.

– Robinio, 11 years old