Kindle only lets me download samples?

Ok so i have the kindle app on my iphone and i want to download a book but it only is letting me download the samples. How can i download the whole book?

You need have a amazon account and need to be logged in and with a valid payment method so you can be charged for it. And, of course free kindle books are not charged. Go to the end of the sample and you should get a page to add to wish list, you would then need to switch to the Amazon Shopping App or use safari to open amazon ( www.amazon.com/kindlemobilestore ) and purchase that item off your wish list. Use the drop down and select your iphone as the delivery device. Sorry it's the only way.

Your Amazon account must have a valid debit or credit card in its settings and I believe it has to be one with a name on it, not something prepaid bought in a store (thought here may be some exceptions) if you don't have your own card, it can be a parent's if they let you use it. The card is required to be present to buy any instant digital content, even if the content is free, and even if you have an Amazon gift card balance in your account.