A self-promote memoir or a limited non-fiction book
The book doesn't touch what Ted Osius yielded in order to reconcile to Socialist Republic of Vietnam during his term as US ambassador from 2014 to 2017. That is why "nothing is impossible!"
For example, to please the Communist regime in Hanoi, Ted Osius -and John Kerry in the book's foreword- offers blames on Ngo Dinh Diem in the South and sings the praises of Communist leaders in the North. Another example, both John Kerry and Ted Osius concluded the Vietnam War (1960-1975) was a "fight for independence" on the part of Communist Vietnam.
That could be the official policy of the US government and Ted Osius just carried it out in the 2000s!