I am the author of three logic and critical thinking books, which are published by Classical Academic Press:

Argument Builder

Discovery of Deduction (co-author)

Everyday Debate

You can find these books at Classical Academic PressĀ here.

And you can also order them from Amazon:

Everyday Debate (I recommend starting with this one.)

Argument Builder

Discovery of Deduction

You can read more about the importance of critical thinking here:

Five Ways to Think more Critically and How it Benefits You

I also recently published an article on playfulness with Tiny Buddha, which you can read here:

How I Overcame the Stress of Perfectionism by Learning to Play Again

And here is a recent article I wrote for Tiny Buddha on Mindfulness:

How Mindfulness Helped Me Become My Own Best Friend