Due to Amazon’s strange and non-transparent policies, I am unable to make the summaries available on Kindle for direct purchase. But worry not. You can still read them on Kindle.
Just buy them on Pothi.com and send me a mail at firstname.lastname@example.org with order number. I will mail you back a Mobi file that you can sideload into Kindle.
I know that it isn’t as convenient as being able to buy directly from Amazon. But this is the best we can do right now. Also the good thing about buying from Pothi.com is that you get a DRM free EPUB And PDF. So you are not stuck to reading the summaries on any single device.