The book is not in the public domain (copyright typically lasts for the life of the author plus 70 years in the U.S., and Goldschneider died in 2016). Furthermore, the publisher, Sterling Publishing (now part of Union Square & Co.), maintains exclusive digital distribution rights. While Open Library may possess a physical copy that has been scanned, the legality of lending that scan has been challenged in court (most notably in Hachette v. Internet Archive in 2023), where a federal judge ruled that the Internet Archive’s CDL practices were not fair use. Consequently, many popular in-copyright books have been removed from open lending or are inaccessible.

"The Secret Language of Birthdays" succeeds as a lively, user‑friendly compendium of archetypal portraits. Its power lies in memorable phrasing, social utility, and the human appetite for stories that name traits. It should be read as cultural commentary and conversational tool rather than scientific authority. For readers who value narrative insight and playful self‑inquiry, it is an engaging companion; for those seeking rigorous personality assessment, it is a springboard to deeper, evidence‑based resources.

: While primarily available through the site's in-browser reader, some versions are available as PDF or ePub downloads for users who have checked them out.

If the queue is too long (sometimes 50+ people waiting for one digital copy), consider these alternatives: