Stephen Baxter 
Origin [EPUB ebook] 

2015: Astronaut Reid Malenfant is flying over the African continent, intent on examining a mysterious glowing construct in Earth’s orbit.But when the very fabric of the sky tears open, spilling living creatures to the ground and pulling others inside, including Reid’s wife, Emma, his quest to uncover the unknown becomes personal.While desperately searching to discover what happened to the woman he loves, Reid embarks upon an adventure to the very fount of human development . . . on earth and beyond.