Entry #3 in Edgar Ruce Burroughs Barsoom series, The Warlord of Mars follows on from the previous entry (The Gods of Mars), with John Carter counting down the days until the release of Dejah Thoris from the prison in which she was trapped at the end of that book. Of course, and quite early in this, she is released and captured by some of Carters enemies from that previous entry, tying the events of this directly into the events of that novel.

Unlike the previous entry (which started on Earth), the entirety of this novel takes place on Mars itself. It is also very much so a 'classic' boys own adventure story, full of numerous battles, a little bit of intrigue and some narrow escapes - as before, it is easy to see the influence this would have on later, perhaps better well known, stories by various authors.