Nikon D90 by Corey Hilz is a comprehensive, beginner-friendly guide to mastering the Nikon D90 DSLR, published as part of the Focal Digital Camera Guides series. Rather than serving as a simple camera manual, the book teaches photographers how to use every feature of the Nikon D90 to create high-quality images in real-world situations. It explains the camera's controls, menus, shooting modes, autofocus system, metering, exposure, white balance, flash, Live View, video recording, image quality settings, and custom functions in a clear, practical manner.

Beyond camera operation, Corey Hilz focuses on the art of photography itself. Through hundreds of full-colour examples and step-by-step tutorials, he demonstrates how to work with natural light, choose lenses, compose stronger images, and photograph portraits, landscapes, wildlife, travel, sports, products, and close-up subjects. The book also covers Nikon software, RAW processing, colour management, workflow, image organization, and essential accessories, making it a complete learning resource for both new DSLR owners and enthusiasts seeking to improve their photography.