You will find that this activity book has a gentle learning curve for beginners.
The Virtue of Selfishness: Fiftieth Anniversary Edition by Rand, Ayn
You will find that this activity book has enough content for weeks of fun.
Epistemology: Becoming Intellectually Virtuous (Contours of Christia – VERY GOOD
With this activity book, you’ll find plenty of puzzles to keep you busy for hours.
