It's like $18 on Amazon right now for the paperback. I've got a first edition from 1992 so it might be time to get the current, third, edition and see what's improved! My use is strictly recreational, and learned by practice. Here's the book's library numbers:
ISBN-10: 0983402191
ISBN-13: 978-0983402190
Most striking thing I learned was to never break contact during massage: once you start touching, a part of your body always stays in contact. Breaking contact leaves the person feeling abandoned, and this provided an explanation for sessions when I'm receiving and felt uneasy/confused/worried when contact stops.
I'd recommend to pick a book/body section and focus on that with a willing subject. Bonus points if they'll agree to provide honest verbal feedback during or after. And not every massage has to end with an orgasm.
I'm stunned by how nice an entire forearm feels running down my back, or up the inside of my legs. And when any stroke continues over the cock & balls, without focusing on them, it can lead to an amazing session.
Random trivia - inner thighs work like a penis pump for me; the more you work that section the harder I get. The girls at my local AMP laugh about it, because even on days when I just want massage they can get me up & down at will. They'll do inner thighs for a rise, then back to feet for the drop, and repeat until I either ask them to knock it off or to finish what they started.