Fringe is but a memory today as its spectacular series finale aired last Friday. The show and its unforgettable characters will always live on in our hearts and reruns…and in September’s Notebook. From publisher Insight Editions and authors Tara Bennett and Paul Terry (the duo that penned the Lost Encyclopedia) comes an official TV tie-in book that’s filled with all kinds of Fringe lore. The 192-page hardback notebook briefly showed up on screen in episode 510 “The Boy Must Live” and it can be yours to keep come March.

Fringe: September’s Notebook — The Bishop Paradox charts all five seasons of the show and is described as “an essential, and fully sanctioned, part of Fringe‘s mythology.” Words are disseminated from the perspective of our favorite Observer known as September and then Donald and the book includes “lush in-world storytelling and thousands of never-before-seen images that provide new insight into the series.” In other words, this is a true must-have for fans of the series because it actually expands on what we’ve seen happen over the course of the show. If you still have lingering questions after watching the finale, perhaps this book will shed light on your ongoing theories.

Moreover, the book is “overflowing with September’s handwritten observations, covert photographs, personal sketches and musings, as well as extensive FBI case files and hyper-detailed Massive Dynamic intel. Fans will even be able to interact with September’s movable notes, salvaged elements, and highly classified tangible elements.”

September’s Notebook, which also includes a forward by Fringe showrunners J.H. Wyman and Jeff Pinkner, is up for preorder today and goes on sale in March for $50 at Insight Editions. Explore pages from the book at that link, too. Also, the book’s official site features some really great Fringe wallpapers for desktops and smartphones. [Update: Amazon‘s got it for $31.50.]

The perfect gift for the cult Fringe fan.