"Caution: Aliens at Work" by R.L. Stine is a first edition trade paperback published in 1998 by Random House Children's Books. It is part of the "Ghosts of Fear Street" series and falls under the genre of juvenile fiction, specifically in the horror and ghost story topics. The book, with 128 pages, is written in English and measures 7.4 inches in length, 5.2 inches in width, and 0.4 inches in height, with a weight of 3.2 ounces. The author's engaging storytelling and spooky tale make this book a thrilling read for young readers.