Can I purchase books on kindle without using credit card information?

Is there a way to use gift cards for amazon to purchase books without ever entering my credit card information? I'm a little apprehensive about giving them my credit card number.
>>> Can I purchase books on kindle without using credit card information?

Which is the best tablet? (kindle fire hd or google nexus 7)?

Which is better and why.
also can you download the amazon app on the nexus.
>>> Which is the best tablet? (kindle fire hd or google nexus 7)?

Can somebody help us please, we are totally out of touch with technology?

Especially the Kindle Fire HD etc the adverts say you can store books on here but what they don't tell the uninitiated is whether you have to read them yourself or whether the book is read out for you.
>>> Can somebody help us please, we are totally out of touch with technology?

Does the kindle fire HD have instagram?

Does it?
>>> Does the kindle fire HD have instagram?

Kindle Fire HD do all this (or most)?

Hi! So I was wondering does the Kindle fire HD DO ALL THIS or most of these things!

-Can get NEtflix
-wifi everywhere
-Barley glitches
- IN COLOR
- go on internet
-gets Facebook and Twitter
AND CAN it go on Instagram???
>>> Kindle Fire HD do all this (or most)?

I bought the kindle fire hd and youtube wont work on it?

Is there anyway i can get youtube on there its the main reasone i bought it
>>> I bought the kindle fire hd and youtube wont work on it?

Pros and cons on the kindle keyboard 3G?

I'm planning on getting one…
Can someone please give me their opinion on the kindle keyboard 3G?
Thanks :)
>>> Pros and cons on the kindle keyboard 3G?

Kindle Help, which one to get?

Which kindle do you think is the best? On the e-ink kindles can you get apps, can you get apps on the new kindle (eg. Game apps like 'cut the rope' and 'angry birds). What are the pros and cons of some of the kindles. Whih screen is better. Backlit or non backlit/ e ink?

Thanx in advance for answering
Ami.x
>>> Kindle Help, which one to get?

How to get my kindle fire touch screen to work?

Havent used kindle fire for about a month, charged it and turned it on and the screen is not responding.does anyone have any suggestions to fix this problem?
>>> How to get my kindle fire touch screen to work?

Just bought app off amazon on desktop.how to get that on kindle fire hd?

Hi, I am soooo new to the tablet world and any kindle or amazon products… but I just bought an app on amazon.com in the appstore, and was wondering how to deliver it to my kindle fire hd? I don't have wifi right now, but that could change if I needed it! Do I need wifi to put my app on my kindle? If not, how do you do so? I don't care if it gets on the cloud or device lol! Just wanna know how to access it! :) Thanks in advance!
>>> Just bought app off amazon on desktop.how to get that on kindle fire hd?