In response to the news that security researchers have discovered a security hole in the “Manage your Kindle page” on Amazon’s website, that provides hackers with users’ credentials, Mark James, security expert at ESET says:
http://news.softpedia.com/news/Malicious-Kindle-Ebooks-Can-Give-Hackers-Access-to-Your-Amazon-Account-458983.shtml
“If you enjoy having lots of books to read while travelling around on business or relaxing by the pool on vacation then the thought of having them all on an electronic device seems prefect. The Amazon Kindle is an excellent device for this and if you have one you probably struggle with the concept of paying the same if not more for an electronic version of the book than the good old fashioned paper version. It does not make sense when you look at the production, duplication and storage costs of paper books alongside the exact same but in electronic format it just does not add up. However, think very hard before you go looking on questionable websites for a cheaper or free version of the eBook as it may easily contain malware.
I am sure your first thoughts would be "impossible" it can't happen, a book cannot contain malware, well you’re wrong. Compromised books have been found to have scripts embedded in the titles that when executed will attempt to send your Amazon account cookies to the attacker, which could enable them to compromise your Amazon account. Amazon was informed about this last November and they fixed it within days, but when they rolled out their new "Manage your kindle" page earlier this year it manifested itself again. If you want to protect yourself then its relatively easy to do so "DO NOT" download eBooks or pdfs from untrusted sources. It really is not worth it to save a few pounds.”