I use kindle and apple kindle app btw, so don't know if the books are available on other formats. Ive got two books on the go at the moment. Really like james patterson books. This one is a fav of mine now:
http://amzn.to/FQ0L10 
I have just started reading, got good reviews and am really liking it so far.
http://amzn.to/FPeXum 
For my kid, 3 ebooks just been reading: Beatrix potter Mrs. Tittlemouse. Her books are great and can't go wrong with them.
http://amzn.to/FQ7utz
Baby Farm Animals: simple good read.
http://amzn.to/Ap6Giz
Oliver and The Sandmen: Fantasy adventure, bit like Briggs work, not
as good but cheap though.
http://amzn.to/wWpbrV
Will be looking to classics like famous five and jacky wilsons etc as she enters the next age group.