The Fever Code is the last Maze Runner book?

Today on Twitter, I just saw promotional art released by James Dashner for this September's The Fever Code, take a look at the art below!

But the thing that is capturing everyone's attention is the fact that it states clearly that this is the final book in the Maze Runner series, so what do you guys think? Are you sad or feel content that this is the final Maze Runner book in the series? Also at 5:30 pm and 8:30 pm eastern time we will be having a crowd play of Batman: The Telltale Series Episode 1! Be sure to join us!