Trilobite

Usually a species has 10 million years or so of evolving, eating, chasing, playing, maybe doing homework, or even going to the moon before it goes extinct.
Trilobite was a super-invader with its stomach in its head. 20,000 species of them survived over millions of years and even through two mass extinctions. Discover the secrets of these successful super-invaders and the Great Dying event which finally eliminated them 250 million years ago.
Collect all eight books about animals we have lost in mass extinctions caused by asteroids or mega-volcanoes, clashing continents and climate change.