One Piece, Vol. 49 continues where the previous tankōbon left off and contains the next eleven chapters (471–481) of the on-going manga series.
This tankōbon continues the Thriller Bark Arc. While Monkey D. Luffy chases Geckō Moria across Thriller Bark, his crew does their best to defeat Oars. Though they almost succeed, Oars is quickly joined by Moria, who gives him the advantage he needs to decimate the crew.
Luffy, unaware that Moria has turned back and joined Oars, runs into a group of pirates who have lost their shadows. Seeing Luffy as their hope for freedom, they provide him with the means to bring down Moria: a hundred shadows they have managed to take back from the island's zombies.
With that Luffy engages Oars, and with the help of his crew, they finally defeat the giant. However, the Thriller Bark's course having been left unattended, as they noticed that the fog begins to thin and the sun begins to rise. Moria, seeing this as an effective way to get rid of the Straw Hats, as when sunlight shines on those without shadows instantly dies, so he absorbs all the island's shadows to kill time until sunrise.
This tankōbon is written and illustrated by Eiichirō Oda. For the most part it is written and constructed rather well. It is another battle tankōbon where the Straw Hat Pirates are battling Oars – a giant zombie to free Monkey D. Luffy's soul, while the captain goes after Geckō Moria to have him release all the shadows he possesses and return them to their original owners. Eventually, Oars is defeated, but dawn is approaching and those without shadows die instantly in sunlight and Moria has absorbed all the shadows he possess.
All in all, One Piece, Vol. 49 is a wonderful continuation to a series that seems really intriguing and I can't wait to read more.