I would say that Sam definitely seems to be more of the central character than Frodo in RotK.
I would also say the shift happens before The Tower of Cirith Ungol. It becomes very evident in The Choices of Master Samwise but I would say it starts to switch after Faramir lets them go. From then on I would say Sam increases whereas Frodo starts to decrease. Frodo is still making the important decisions but Sam is helping him more and more. For example, when Frodo, Sam, and Gollum are going past Minas Morgul Sam has to encourage Frodo to keep going because the ring is starting to have very evident power over Frodo. Even though Frodo is still featured as the main character in this part of the book, Sam is also having a much larger role.
|