With my daughter it was unavoidable. Her dad (me) could never sit still. She'd been to Joshua Tree on climbing trips that her mom and I would take a few times each year. Here first trip was when she was only a few months old.
I surf and I used to compete in spearfishing meets in the 80' and 90's so she got an early intro into marine biology. We'd play in the tidepools after my meets and she'd pick up and handle any creature I'd pull up (basically, everything). Later, she would venture out and actually go freediving with me. She wasn't keen on killing or capturing anything though, and although she was always proud of dad for dragging a decent fish onto the beach, occasionally she would give me some stink-eye. During her Summer vacation between junior and senior high school years, we made a trip to the Galapagos Islands and it was a great learning experience for both of us.
She'd go flyfishing with me as well, and has turned out to be pretty good at it.
After her mom and I split, her mom moved the two of them to Denver. My ex continued to climb, so my daughter took up climbing and still continues to do so.
Being the only kid, the poor thing had to put up with being a bit of a tomboy for dad's sake in her early years. Now she's off to ASU and in the end she's turning out very well.
As for the book...never read it, but I've read about it. I also recall seeing an interview with the author on TV. All that I've experienced or gathered on the subject I'd agree with....kids NEED to have these experiences.