The return of the king: being the third part of The Lord of the rings
(Book)

As the armies of the Dark Lord gather, Aragorn joins with the Riders of Rohan, Merry and Pippin escape into the Fangorn Forest and meet the Ents, Gandalf returns, and Sam and Frodo are separated after Frodo is captured by the Orcs.
The Return of the King is the third part of J.R.R. Tolkien's epic adventure, The Lord of the Rings. The Companions of the Ring have become involved in separate adventures as the quest continues. Aragorn, revealed as the hidden heir of the ancient Kings of the West, joined with the Riders of Rohan against the forces of Isengard and took part in the desperate victory of the Hornburg. Merry and Pippin, captured by Orcs, escaped into Fangorn Forest and there encountered the Ents. Gandalf returned, miraculously, and defeated the evil wizard, Saruman. Meanwhile, Sam and Frodo progressed toward Mordor to destroy the Ring, accompanied by Sméagol---Gollum, still obsessed by his "preciouss." After a battle with the giant spider, Shelob, Sam left his master for dead; but Frodo is still alive---in the hands of the Orcs. And all the time the armies of the Dark Lord are massing.