This is OK Holocaust series helped by colourful settings and suspenseful plotting and polluted by some sleazy (im)morality. First, hero ponders he would not necessarily help an ugly woman (so unlike blonde heroine) threatened by Nazis. So Nazis could torture and murder an ugly woman? Also, one of the villains is not just Nazi, he is - gasp! - fat. "It is not what goes into the mouth pollutes the man, but it is what proceeds out of the mouth that pollutes the man." Guess who said so, Bodie and Brock? Yep, Jesus.
I love the Thoenes' books. This one was no exception. While I am not fond of books in series that end without closure (here I would like to have seen the boys reunited), it was still a book that definitely held my attention--and left me wanting to read the next book in the series.