Right now, I really like any book that has the capacity to run creatures immune to Psychic and vs. Living effects. I feel when you do this you get to hose most Warlocks, the Johkarti, the Forcemaster, and zombie Necromancers. The problem for the Warlock is that your Blood Reaper is going to turn on all of those book types.
In Magic it is normal to finish best 2 of 3 games in 50 minutes (or 55 minutes at the professional level).
The Spellbook is sort of deck and sideboard in one. In Magic, you get 75 cards and only get to run 60 of them at a time. In Mage Wars you get 120 points of cards, and always have access to all of them, even if you only use 40-60% in most match-ups. Both games you play cards that are for corner cases/special occasions!