kindle organisation on nexus

[pantshavenames]

Help, I have upgraded from a basic kindle to a nexus which is great except I don't know how to organise books into collections so have to scroll through everything which is a pain now at 100 books but is only going to become more so. Is there a way I can do this, ideally keeping the option of seeing the front cover which I love versus just text lists?
Tia

The collections feature isn't available in the Android and iOS Kindle apps. I hadn't realised this until you posted!

Arse
Thanks anyway

There is an application called Calibre you can use to manage your Kindle content, which has an Android app as well, but it means converting the Kindle content from its current format to another one, which removes the Digital Rights Management encoding that prevents illegal sharing of the book. Here's an article about it. You may or may not be comfortable with doing that - but thought I would point it out.