[ferrywoman]

There's another mystery code promotion though a bit different from the past ones.

The good: 50%-90% coupon codes
The bad: Only for select e-books

https://store.kobobooks.com/p/mysterydeal

Tried my code on a random book. Did not work.
Worked for the books in the lists.

Fine print:

Spoiler:

Mystery Sale: Offer is valid for select eBook purchases from this list. Offer valid from April 25th, 2016 12:00 AM EST through April 28th, 2016 11:59 PM EST. This offer is not valid in conjunction with any other offer or promotion and cannot be used to adjust amount paid on previous purchases. Discounts cannot be applied nor the discount value refunded once a purchase is complete. Rakuten Kobo Inc. reserves the right to change or cancel this offer at any time without notice. Rakuten Kobo Inc. reserves the right to change or cancel this offer at any time without notice. Coupon value distribution coupon value 50% distribution 15%, coupon value 60% distribution 15%, coupon value 70% distribution 30%, coupon value 75% distribution 25%, coupon value 80% distribution 13.15%, coupon value 85% distribution 1.20%, coupon value 90% distribution 0.65%.