IMO David Westheimer's Von Ryan's Express
and Jack Higgins' The Eagle Has Landed
are two of the finest war novels ever. However, not wishing to step on anyone's tootsies, I have to say that Mark Robson and John Sturges' films of the above mentioned films respectively are nothing short of terrible.
If you haven't read the books, then the films are OK. If you have read the books, then the films are bad.