Rob McGarvey, a heavy duty poster - (privately) published a book of some variants of Hi-Opt II and ZEN.
Primarily, he tweaked the tags and ran sim's.
By so doing he found some interesting results.
"Aces and Faces Blackjack"
ISBN # 096867405
Copyright 2001 in Canada
GO TO: (Dead link: http://geocities.com/acesandfacesblackjack/)
There is a link there for 'Book-Rebate-Offer-Instructions'
That link reads "E-mail me by clicking on this sentence"
Chapters of "Aces and Faces Blackjack"
Preface
Introduction
Index
~ In The Beginning ~
Step One: Playing the Game
Step Two: Basic Strategy
Step Three: Counting Cards
Step Four: Single Deck Play
Story Time One
Step Five: Double Deck Play
Story Time Two
Step Six: Multi Deck Play
"U" Hi Opt II: The Working Man's Count
Money 101 – Maintaining a Bankroll
Money 201 – Leveraging Your Bankroll
Money 301 – Betting Practices
Progressions: The Truth
Story Time Three
~ Skill Sets ~
Playing Indices: Breaking Basic Strategy
Back-Counting and Wonging Out
Shuffle Tracking: Roving TC's
52 Pick-up: Card Recognition
Card Sequencing: Smart Bomb Accuracy
Cover: Hiding the Obvious
Insurance and Surrender on Other Player's Hands
~ Three Level Counts ~
Hi Opt III: Infinity and Beyond
Zen III: Taking the Easy Way Out
Zen III Maximum
~ Double-Plus Good ~
Comping In: R.F.B.
Casino Credit: Using Their Money to Make Yours
Team Play: Maximum Bankroll
You're Cheatin' Heart
~ Welcome to the 21st Century ~
Blackjack on the Internet
I-Casino Deposit Bonus Hustling
Blackjack Software
Game Rules and Expectation
Best Places to Play
Your Mental Attitude
Story Time Four