Check it. You can get my book in every store from Apple iBooks to Barnes and Noble to a bunch of these other things that I've never even heard of. If you've been holding out, take a gander.
Or buy it on every device. There's dumber things to do with your hard earned money.
Tolino? Page Foundry? Don't even worry about it. Buy it everywhere. Mirrored City comes out on these platforms in February.