This book is relatable and amazing! I'll definitely recommend it to anyone, anytime. Gretchen, the author of the book, has a nice sense of humor and i can remember laughing out loud to her stories about her husband and his attitude during the project.
I can say that this book has refined my thoughts about happiness significantly and also kinda made me happier, lol! I'm actually on the verge of embarking on a happiness project although not as elaborate as hers. Great book!
It is pretty long, but if you ignore repetitions and needless descriptions at times, you will find valuable advice! I believe that everyone can find something useful in the book.