How do we keep the right ebooks on the right ereader?   My son is into SiFi & Civil War    I am into Mysteries    He has K3 I have Fire HD.      

I have 2 Kindles.  One is a Kindle Fire that I don't like to read on and just use for games and videos.  (mostly my daughter uses it)  When you buy a book it'll ask you which kindle you want it sent to and I just select my Keyboard.  When you go under Manage Your Kindle and bring up the books you can choose which devices to send it too.  I send some to my IPOD. 

I don't think there's a way to seperate the list on the Manage Your Kindle page.  

I do send cookbooks and anything with pictures to the Fire.  They never show up on my Keyboard unless I go into Manage Your Kindle and specifically send them to my Keyboard.

Thanks Mary!  At least I wont go crazy thinking there is a way LOL  

I had a similar issue, I have short stories that I read on the fly on my phone, but it's much easier to look at the amazon site and choose from it.  So I found that I could send it to a certain device (andriod and Kindle). Its great :) Until i forget to check and send it to the wrong one..LOL

I do that sometimes. It's default is to send to my Keyboard.  But cookbooks and anything with pictures is much better on the Fire.