Even though no essential Christian doctrine comes from these books, but they are very important historical writings. No the Catholics did not included them, they were already in the traditional writings. One example is the book of Maccabees and the celebration of Hanukkah, mentioned in St. John gospel, something Jesus was well aware of and was present in the Temple, where prayers for the dead were said aloud. I'm not sure what Catholic doctrine you are referring to, however the Orthodox just as Protestants do not support the idea of purgatory and is essentially absent from these texts. The idea comes from Maccabees 12:38-41, however this is not correct. That is just one, there are many more. Thanks for your input though.