4 Esdras was used in the early Church so I'm hoping this wonderful book would be revived, it's not like other Deuterocanonical/Apocryphal books, and it has been quoted in several books of the NT. I have commentaries to Jn, Ro, Jas, 1 Clem, and I was able to immediately see from the indexes of these commentaries that each one of them refer to 4 Esdras.
I would really prefer electronic searchable resources such as for Logos on this. That's why I haven't went to printed matter, I've only bought the item by Hephaestus books, a print-on-demand-book, called (long title):
Jewish Eschatology, including: resurrection, resurrection of the dead, jewish messianism, gog and magog, 2 esdras, armilus, 2 baruch, 3 baruch, war of ezekiel 38-39, fate of the unlearned, the secrets of rabbi simon ben yohai, gathering of israel
Within a year from now I can use Biblical Greek properly. I don't know any Latin or any language related to Latin so it would have been hard and less useful for me to learn Latin.
The best Bible version of 4 Esdras is the 1989 Revised English Bible. There is a thread about the REB:
http://community.logos.com/forums/t/45624.aspx