"The Gratitude Sidekick Journal: A 66-Day Daily Gratitude & Mindfulness Challenge" is a 2019 publication by authors Amir Atighehchi, Ariel Banayan, and Michael Ahdoot. This hardcover textbook, part of the "The Gratitude Sidekick" series, focuses on the subject area of health and fitness, with a specific emphasis on gratitude and mindfulness. With a personalized approach and targeted towards adult education levels, this journal provides readers with a 66-day daily challenge to cultivate positive emotions and habits. Published by Every Damn DAY, this journal is a valuable tool for those seeking to enhance their general well-being through daily gratitude exercises.