Catherine Barr & Steve Williams 
Stori Bywyd [EPUB ebook] 

At first, nothing lived on Earth. It was a noisy, hot, scary place. Choking gas exploded from volcanoes and oceans of lava bubbled around the globe… Then in the deep, dark ocean, something amazing happened. This is an exciting and dramatic story about how life began and developed on Planet Earth, written especially for young children. Suitable for key stage 2 pupils.