This is a splendid ancient Greek text of the complete Histories of Herodotus (all nine books) with an accompanying English transation, for Kindle devices. The Kindle presents ten or twelve lines of Greek (depending on font size, of course) on the top half of each page, with the English version of the same passage usefully located on the lower half of the same page. Both Greek and English fonts are georgous on my Paperwhite, and they scale larger or smaller like the text of any normal Kindle book. In effect, we are offered a good alternative to multi-volume English-Greek printed texts, at a much lower cost and in a much smaller package! It's a pleasure to read this book on the Kindle, unlike many other e-books featuring ancient Greek words, sentences, or texts that, for one reason or another, can be quite difficult to make out.
In a few days of reading, I've spotted no obvious errors in the text of either language, and the translation is fairly literal - a useful crib for those focused primarily on the Greek text. The English text, of course, can just as well be read on its own. The Kindle's search function works as expected in English (once you allow sufficient time for this lengthy book to index itself on your machine). I don't have an onboard Greek dictionary, and no way to type in Greek, so I've not tested searches or look-ups in Greek.
The only flaw I've found is quite minor. The Table of Contents seems to end at Book 7. Books 8 and 9 are there, but I found it necessary to hunt them down manually. (To save you the trouble, the last two books begin at Locations 25031 and 27596, respectively.) I used the Kindle's highlight function to ensure I could return more conviently next time, simply by calling up the Highlights. So it's a small flaw with an easy fix.
After too many years, we now know it is possible for ancient Greek texts to come into their own on e-readers. From their website, it appears that the publisher's inspiration for this work was Heinrich Schliemann, who carried his texts with him everywhere, for use whenever he found a moment to read. This is certainly something that Herr Schliemann would have loved!