the blueshifters, parts 1 + 2 (Complete!)

Three young people find that they have special powers as empathic adepts - powers to see The Others. The Others are creatures that look like humans and act like humans but they are definitely not humans and they have a sinister plan for the human race. They are slowly taking over Earth and have been on Earth for a very long time. The three, Dan, Jack and Mary, along with a nerdy bookseller named Andrew and a mysterious man named T with powers of his own must find out who The Others are and what they want. And they must stop them before it is too late for all humans and for Earth.