From the back cover:
High tech meet high adventure
The future is what you make of it. With access to space travel, cybernetics, mutations, mecha, and more in d20 Future, heroes may battle across alien worlds, survive on postapocalyptic Earth, voyage to distant galaxies, and explore alternate dimensions. Charge your weapons and embark on never-ending adventure within the infinite possibilities of the near and distant future.
To use this product, you also need the d20 Modern Roleplaying Game core rulebook. For players and gamemasters, this product is compatible with other d20 System roleplaying games.