For those who have read All Quiet.., I strongly recommend The Road Back, the lesser-known sequel, about the difficulties faced by the returning soldiers fitting into a defeated society where no one understands what they have been through. Also his Three Comrades, which covers similar ground.
Another Remarque book that is worth a read (if you can find it) is Spark Of Life, about life in a concentration camp - something Remarque, as a known leftist, suffered before escaping and getting to Spain (there's another book about that, but I can't remember the title, and it's not one of his better novels, strangely).