Showing appreciation for a book often involves promoting it within your personal network and the wider reading community. You can write a thoughtful review sharing what you liked about the book and post it on platforms where it can influence potential readers, like online bookstores or book-focused social media. Another way to show appreciation is by recommending the book to friends, family, or book clubs. Also, engaging with the author directly, if possible, to express your thoughts about the book can be a sincere gesture of appreciation.