OK, don't say I never did anything for you, coz the Critical IF gamebook series is free on Kindle through till Sunday. The four books are diceless, so they actually work pretty well as ebooks (hyperlinked, obviously). Not an offer to be sneezed at, eh?
And come back on Friday for Camelot Eclipsed, a complete roleplaying campaign set in the days after King Arthur's fall. That should awaken the dragon.