I am a big fan of the in-universe books like The Book Sith and The Jedi Path. Even the Essential Chronology (and the NEW Essential Chronology) is written like a history book. This lightsaber blueprint by Lord Libidan looks like it could have been stitched by some Jedi Master on a backwater planet with no access to flimsy or a holocron. I’m sorta geeking out, sue me.
You can check out Lord Libidan’s site here with all sorts of neats stuff and links to stores, free patterns, etc.