General Hieu, ARVN - A Military Genius
and
Général Hieu, ARVN - Un Génie Militaire

are available in digital format at
Amazon Kindle
Apple iBook
Google eBook
Barnes & Noble Nook
Sony Reader
Price $9.99.

Tướng Hiếu, Một Thiên Tài Quân Sự

is also available at Google eBook Store.
Price $9.99.
(note: if the Vietnamese characters do not appear properly, select type faces Times New Roman, Verdana or Arial)