An updated edition of Letters to Josep: An Introduction to Jewish Life is forthcoming from Kasva Press (it was planned for April 2019, but has been delayed indefinitely…) You can still purchase the current edition of Letters to Josep: An Introduction to Judaism on Amazon here.
You can also buy the book on: Book Depository (free shipping worldwide), Barnes & Noble, Amazon UK, France, Germany, Spain, and Italy, and a wide variety of other paperback retailers worldwide.
If you prefer a brick-and-mortar store, you can pick up a copy at Pomeranz Booksellers in Jerusalem or Llibreria Geli in Girona!
Bookstores and libraries can purchase it wholesale through Ingram or contact me for better rates.
At the moment the eBook is available exclusively through Amazon Kindle, which allows access to Kindle Unlimited users.
Feel free to check out my author site for information on my other book and additional writings.