Francis Leung has sorted out how to get his book to customers in the USA.
The book is now available in HK but I can send a copy upon your order. The price is HKD120 which is around USD15. Shipping is around HKD119 for surface mail and HKD153 for air mail. You just need to confirm your selection between surface mail and air mail. I will then send invoice to you. Payment will be made through “PayPal”. I will send the book when payment is received.
If interested contact him at firstname.lastname@example.org directly.