Ignore the ^. If you're serious about getting started in Mentalism, you need a good foundation. Or else you're just a magician performing mental magic. Usually, badly.
Now, I've got nothing against Sean Fields, or PaperCrane, etc., who all have wonderful products. But again. It's the difference between learning mental tricks, and learning Mentalism. There's a world of difference.
If you're serious about Mentalism, the best and most recommended would be Bob Cassidy's Fundamentals and Corinda's 13 Steps to Mentalism. Fundamentals, for, well, exactly that. Laying the groundwork. 13 Steps for its comprehensive coverage of Mentalism in general.
Kenton, and Brook, both amazing, but save it. Save it for when you can appreciate it and make the most of it.
It's like when you first start out in card magic - you get some stuff from YouTube, download some more things, you know, you get all these tricks. Then you really discover card magic, you discover where you start learning properly, and suddenly, you realise how bad those kids on YouTube actually were. You realise what truly matters about magic, how to make it more powerful, and you start learning the real tools you need to improve your magic exponentially.
This is one of those times. Skip the aimless effects, and get a good starting point. Learn about mentalism if you really want to know more, because if you can't perform mentalism, you butcher the effects. You'll save six months at least in money and practice, and be a better performer for it.