Mine are coming up on 22-23 April. A free Kindle download copy of ANIMAIA will be available at the Amazon store on those days.
KDP Select is an interesting Amazon initiative. It demands exclusivity of availability in return for some promotion. Some authors like it a lot and others are not so keen. The feedback is mostly positive it seems to me.
I'll see how it goes. Promotion of the free days is underway. You can still buy in now if you wish at $3.99.