The Valkyrie Protocol is a thrilling piece of science fiction written by authors David Weber and Jacob Holo. Published in 2020 by Baen Books, this hardcover book has a length of 9.2 inches, a height of 1.8 inches, and a width of 6.1 inches. It has a weight of 29.5 ounces and contains 432 pages.The book tells the story of a group of time-traveling agents who are tasked with preventing a catastrophic event that could change the course of history. With its gripping plot and captivating characters, The Valkyrie Protocol is a must-read for fans of science fiction and time travel.