Cirrus@Austlit

'Ben Cartwright, former soldier, home to mourn the loss of his father stumbles upon cryptic letters from the past between the author, Arthur Conan Doyle and his great, great grandfather who vanished while exploring the Amazon jungle in 1908. Amazingly, these letters lead Ben to believe that his ancestor's expedition was the basis for Doyle's fantastical tale of a lost world inhabited by long extinct creatures. As Ben digs some more he finds clues to the whereabouts of a lost notebook that might contain a map to a place that is home to creatures that would rewrite everything known about history, biology and evolution. But other parties now know about the notebook, and will do anything to obtain it. For Ben and his friends, it becomes a race against time and against ruthless rivals. In the remotest corners of Venezuela, along winding river trails known only to lost tribes, and through near impenetrable jungle, Ben and his novice team find a forbidden place more terrifying and dangerous than anything they could ever have imagined.'  (Publication summary)

'"A small change today can change our tomorrow. A small change 100 million years ago can change everything."

'No one really noticed when things started to change. Some animals vanished. Some new ones appeared. Then some things appeared that were monstrous. No one seemed to notice except Ben Cartwright and the other survivors of the hidden plateau in the depths of the Amazon Jungle. Only they were aware of the growing threat to the human race.

'While Andy Martin lived out his dreams by venturing north to witness the birth of the American continent and navigate a prehistoric inland sea of the Late Cretaceous, whatever he was doing was rippling forward to change our world. Every day brought new threats in the form of creatures that should have long been extinct, or newly evolved monstrosities that were from mankind's worst nightmares.

'The comet, Primordia, was returning and time was up. They had to go back and find Andy and stop him before mankind vanished from the face of the Earth.

'In the thrilling 3rd installment of the blockbusting PRIMORDIA series, Greig Beck explores a frightening world where evolution has gone wild, while also taking us further into the prehistoric Cretaceous jungle and oceans, to a time in which mankind was never meant to exist.'

Source: Publisher's blurb.