The Wheel of Time prequel, New Spring, is a very good addition to the series written by Robert Jordan. I read New Spring after Booke 5, The Fires of Heaven, based off the recommendation of several WoT fans instead of after Crossroads of Twilight (Book 10) when the prequel was published. Considering that Moiraine and Lan are the main POV characters throught the book and that after the events of The Fires of Heaven, reading the prequel when I did made New Spring both enjoyable and bittersweet.
Obviously New Spring helps explain the motivations of both Moiraine and Lan when we first meet them in The Eye of the World, but it also gives us a view of the “normal” workings of Aes Sedai and the White Tower before the unusual happenings already seen in the series. Politics of the world are fully in view with Lan finding himself in the midst of the “biggest” political storm. If I were to find a bad thing about New Spring is that some of the material that Jordan wrote to expand New Spring from a short story to a full novel(la) seems to be just filler making the story bog down a tad.
Overall, New Spring is a good quality introduction to some of the “older” characters of the early Wheel of Time books and I fully recommend reading it, especially after Book 5, The Fires of Heaven.