Do you have a book series that you revisit on a regular basis? Is it maybe one from your youth that may have really resonated for you or just a series that you find to be a familiar realm to go back to once in a while? I have several such series that at any point I could pick up and instantly be back in more peaceful state of mind. During the winter, with weather being more unpredictable and dreary, I always try to find time to find a series that I have enjoyed and go back to it or to try out a new series to make an escape from the elements and from the stresses that the holiday season can bring.
One of the several series that I constantly find myself revisiting is the Inheritance Cycle by Christopher Paolini. In this four book fantasy series, a young man named Eragon becomes entangled in the power struggles of a world ravaged by fear, war, and oppression of a seemingly undefeatable ruler. When Eragon happens upon a large, smooth blue stone, he is thrust into the center of revolts, treachery, and schemes that he must maneuver to find his own path. While it is most often classified as a teen series, I would argue that adults who are fans of fantasy series test it out for themselves.
Another one of my favorite series is The Witcher Series by Andrzej Sapkowski. This is an eight book series that follows a witcher, Geralt, as he ventures across the world to avoid fate and destiny. Combined with political intrigue, magic, destiny, and a quippy bard Geralt can't seem to get rid of, Sapkowski encapsulates all that I think a fantasy fiction fan can ask for in a long running series. Intended more for adult fantasy readers, this series intertwines original story with references to magical beings and creatures from a plethora of traditional fairy tales.
A series newer to me is the Dublin Murder Squad Series by Tana French which is more along the lines of crime drama and psychological suspense. In the six book series, French decides to focus on major cases taken on by the Dublin Murder Squad rather than focusing in on one specific main character. This series was recommended to me by a close friend who reads investigative mysteries and I was not disappointed as I quickly finished it. With many twists and turns, this series keeps you guessing and satisfies the interests of those that like both investigative mysteries and suspense crime thrillers.
If none of these are striking your interests, I also have two book lists of other series that might be the next series that you recommend to your fellow readers or the one you find yourself returning to again and again.