Is it possible to import two tex files with \input and to have the content of the one file be always on the left page facing the content of the other file being always on the right? The page numbers should go on continuously 1, 2, 3, 4, ...
(Actually I guess that this is not so easy to be achieved.)
I imagine something like this:
%!TEX TS-program = lualatexmk
\documentclass{scrbook}
\begin{document}
\input[left]{file_A.tex}
\input[right]{file_B.tex}
\end{document}
Both files would just consist of simple data such as
\chapter{Chapter}
Text.
\section{Section}
Text. ...
Nonetheless both files will be long and contain several pages worth of text. In other words, I would have two long files file_A.tex and file_B.tex and latex fills me the left page consecutively with the contents of A and the right pages consecutively with the contents of B.
This being said, I don't mind (and in fact would prefer!) to cut the contents of the two files in page-size chunks by manually using \pagebreak several times at appropriate places within each file.

eledmac/eledpar, as I have been unable to overcome my problems with these packages for three years. – ClintEastwood Jan 28 '15 at 19:11eledparcreates page breaks automatically is unsatisfying in my case, i.e., the text on the left is not synchronised with the text on the right. It's just not good enough to be published that way, although some features ofeledparare just really cool. Sinceeledparautomatises many thinks (e.g., page breaks and so on ) and does not allow the user to intervene, I am now looking for a less automatic and more hands-on approach - even if that is at the expense of the cool features. – ClintEastwood Jan 30 '15 at 06:50\ledpb? I tried it but could not make it work. I'd be glad if you could show me here in an answer how I can useeledparwith manual page breaks on both pages. just a quick minimal example would suffice. you could also do it here: http://tex.stackexchange.com/a/147018/12277 – ClintEastwood Jan 30 '15 at 11:32