Seeking for the leading actor on the cosmic stage: Galaxies versus
  Supermassive Black Holes
  We present a Special Issue on the interplay of galaxies and Supermassive
Black Holes (SMBHs) recently published in Advances in Astronomy. This is the
introductory paper containing the motivation for this Special Issue together
with a brief description of the articles which are part of the manuscript and
the link to the entire book (http://www.hindawi.com/journals/aa/si/610485/). We
hope this Special Issue will be useful for many astronomers who want to get an
update on the current status of the AGN-Galaxy coevolution topic.
