Sounds good, though I wonder if a lot of people will see the $1 saved as worth the difference. It sounds more of a savings at $7.00 I would think which would be $2.33 a piece for the 3 + the free one. Then a person thinks "I'm only saving .33 per book, but it is 3 books I'm getting." instead of "I will only save $1.00 by buying the omnibus," (at the 7.99 vs. 7.00 price). Just how I see the difference in pricing.

Good luck with the omnibus.