Detective Comics
Detective Comics is an American comic book series published by DC Comics. The first volume, published from 1937 to 2011 (and later continued in 2016), is best known for introducing the superhero Batman in "Detective Comics" #27 (cover dated May 1939).
The Batman Chronicles (trade paperback)
The Batman Chronicles is a series of trade paperbacks published by DC Comics, intended to reprint all Batman stories from "Detective Comics", "Batman", "World's Finest Comics", and other titles throughout the character's history, chronologically (based on publication date), starting with his earliest appearances. Whether or not the series will collect the post-Crisis version of Batman as well remains to be seen. They are priced significantly lower than the "Batman Archives" series in order to be more affordable for the reader. Each volume is typically priced at $14.99 USD. 11 volumes have been produced so far. After a 2-year hiatus, "The Batman Chronicles" returned with volume 11 in December 2012. No further volumes have been announced yet.