My first book on Kindle was this one..
2 B R 0 2 B
It stands for To Be Or Not To Be...
The story is set in a futuristic time when mortality has been conquered and death is voluntary. The population is constant. If there is to be a birth of a baby, someone needs to volunteer to die; only then the birth is allowed. During this age, a mother is giving birth to triplets and what happens to the babies is the story.
It is free on amazon. Read it. It will not take more than half an hour.
I read it on my cellphone. The kindle app is so easy to use and can be installed on any electronic device.