The third edition of The Trails of M-22 is a guidebook blended with digital content. Trail maps in this book are accompanied by a QR code linking you to a larger and more detailed version on the MichiganTrailMaps.com website. Those maps can be downloaded onto a mobile device or printed and then used on the trail. Also on the website are links to Avenza Map Store that will enable you to download a georeferenced version of the maps.