One version has 26 Paraliminals and one version has 34 Paraliminals (the "complete" version). You can find the description of both products in the Learning Strategies "Product" page. I ordered the 26-version one recently and changed 4 of them from the Ultimate version for newer titles from the Complete version for a nominal fee. I also got the Paraliminal Accelerator, which I have personally found to be worth in helping me get the best of the Paraliminal Library.