Key out of Time

Key Out of Time is a science fiction novel by Andre Norton, published in the early 1960s. It follows Time Agent Ross Murdock and his team as they explore the seemingly idyllic world of Hawaika, searching for signs of an ancient civilization. Their mission becomes perilous as they encounter ancient alien technology and prehistoric battles, revealing the hidden dangers of their tranquil surroundings. This book is the fourth installment in Norton's Forerunner universe, continuing themes of time travel and interstellar conflict.