The book series featuring a hero named Frodo Baggins is "The Lord of the Rings," written by J.R.R. Tolkien. Published in three volumes from 1954 to 1955, the series follows the journey of Frodo, a hobbit entrusted with the task of destroying the One Ring. This epic tale explores themes of friendship, bravery, and the struggle between good and evil. Frodo's quest takes him and his companions through Middle-earth, facing various challenges and adversaries along the way. The series has had a profound impact on fantasy literature and has been adapted into a highly successful film trilogy, further popularizing the story.