Under the name Gail Perry, Johnston is the author and designer of the 2025 Page-A-Day calendar titled Walks of the World: Discover 25 Epic Treks & Multiday, Hut-to-Hut Hikes, now available on Amazon and pageaday.com. This stunning calendar is a detailed guide to long-distance trails that weave through distinctive landscapes and offer lodging options along the way. Learn more at gailperrytreks.com and follow @gailperrytreks for regular posts and reels about travel and trekking.
When working from home suddenly became the new normal, Workman Publishing contracted with Johnston to write, design and illustrate Page-A-Day® calendars with daily working-from-home tips. The 2023 Working from Home Page-A-Day is still available on Amazon.