Didn't want to put on as a deal for obvious reasons but the wiki guide for Kindle/Android is quite cheap. I got it for £0.23.https://www.amazon.co.uk/gp/aw/d/B01N2P1027/ref=mp_s_a_1_2?ie=UTF8&qid=1482891512&sr=8-2&pi=SY200_QL40&keywords=final+fantasy+15+guide&dpPl=1&dpID=511TESR%2BLdL&ref=plSrch
It is priced at £3.23 or free with Kindle unlimited. So great if you are a subscriber. There is a 30 day free trial you could take advantage of (but remember to cancel)
I downloaded the Kindle for Android app and my account automatically linked in. Soon followed an email giving me £3 off my first Kindle book purchase. So just £0.23 it cost me.
I know there will be guides all over the net for free but on first look it seems a nice format and for so little money is handy to have alongside on your phone. Just thought I would share!
Also, for doing it got a £1 credit for Amazon instant video to use. Not going to set the world on fire I know!