[Q] auto sync ebooks epub/pdf/txt across my NST and other android devices

here's what I want to achieve... download an ebook/epub on my android phone or tablet and have the ebook automatically downloaded to my NST.

Is there such app? It's so much easier to search and download epub on my phone or tablet than the NST which has an horrible touch screen. I want to be able to download an ebook on my phone, read it and continue reading on my NST all automatically..

is there an app for that or a setup to achieve this?