In my honest opinion, if you can't connect with any strength conditioners in the field of baseball that can make a program customed to you, then it might be worth it, but otherwise it's not. I wouldn't down the book, but if you're like me (skinny punk lacking weight and overall strength), this book won't help you. Most of the lifts are pretty basic. But the book does an awesome job of helping you protect your shoulder and gives you the "pitcher exercises".
Again, it all depends what you're looking for. If you're looking for somethinge more percise, don't get it. If you're looking for a good start, it's a great way to start.
I've read the book from cover to cover and studied it. Don't rely on it for strength gains in the gym, because you won't get it. Worth the $60.00? That's up to you.