A book explaining personality and compatibility based on birthdays. - Title: Birthday Encyclopedia - Author: Kiyoshi Matsumura - ISBN: 978-4-8379-2660-5 - Content: Information on personality and compatibility based on birthdays - Publisher: Mikasa Shobo Thank you for looking. It's well-written with information for all 365 days and is a satisfying read. I think it can be used to liven up birthday parties, farewell parties, etc. ·͜· ※This is just one person's opinion※ I've only read it once, but there's a small scratch on the top corner. Please refrain from purchasing if you are concerned. Retail price: 1600 yen I will carefully pack and ship the item. Thank you.