Happy April Fool's Day!
Ha, ha! You've been April Fool'd by Creativity Portal! Whatever bait you've bitten that led you to this page was pure creative bunk (but otherwise convincing, wasn't it?).
Here's your answer to What IS Creative Peak?: It's when your creative curiosity can't resist peeking! And that fake made-up author Rhoda Burrow and her fake book An Artist's Guide to Creative Peak? Fake, fake, fake. She rode a burro up (then down) that mountain! Ha ha ha ha ha ha!
Happy April Fool's Day!