If yuo want to try a work a bit more difficult and rather different from the usual Chriatian biography try 'Dietrich Bonhoeffer' by Eberhard Bethge. This is long, over 800 pages and almost a source document. Bethge has a lot of inside insight, he was one of Bonhoeffers students and eventually married Dietrichs niece. Unlike many popular works Bethge keeps an even hand, he does not waste tiem vilifying the Nazis or seeing vast conspiricies (well at least not against Deitrich). This makes some lines all the more striking. (We see the contents of a note from Dietrich's brother Klaus from when he is on trial saying he does not tear death, but can not stand the faces of the court, that they are pure evil). There are alos scenes from Dietrich's life where the popular works conjure up images of images of hobnailed boots, where instead Bethge has the Nazis in question waiting politely for him to finish his sermon (Bethge's account is very close to those of prisoners who were at the school house where this occured).
It is not an easy read. It is not a simple naritive and takes as much care in the 'boring' parts as it does for the 'action scenes'.
For me, an educated man who already knows Nazis are generally not very nice, one things that is striking is that every instance where Bethge recounts Bonhoeffer managing to get a positive responce serves not so much to blunt that knowledge, but to rather show the kind of man Bonhoeffer was.
I so appreciate it! And I actually haven't read The Hiding Place 
I can be up for a challenge....
