Welcome! I too was surprised to find an entire industry devoted to lucid dreaming. I was particularly stunned and encouraged by the amount of good science in support of lucid dreaming (see Stephen LeBerge at Standford). I have always taken a more spiritual approach to dreams, believing in their prophetic potential, access to higher self, access to the collective unconscious, etc., so I was thrilled to discover the scientific angle to complement my existing beliefs.

I agree the S. LeBerge and D. Love books are an excellent starting point, but I would also add Robert Waggoner's book, Lucid Dreaming: Gateway to the Inner Self, to that list. That one rocked my world, and opened up a whole new world of dream exploration for me. I have also experimented some with supplements, namely galantamine, and have had stunning success with it.

Happy exploring!