This new version is equipped with an E Ink Pearl display, capacitive touch and built-in Wi-Fi to download books wherever you want in seconds.

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What's really important about this iteration of the Kindle DX is what's going on inside: or, more specifically, its new Pearl E Ink display that's purported to boast a 50 percent improved contrast ratio than its predecessor.

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Pearl estimates the most active group of e-commerce customers numbers only 2-3 million.

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Several U.S. officials said FBI investigators on the ground in Pakistan are furiously working with local authorities and "pursuing every lead" -- including closely evaluating the three previous e-mails, which they hope can lead them to Pearl's kidnappers.

CNN: Conflicting reports on missing reporter's fate

Officials concede they are refraining from offering a preliminary or cursory analysis of the e-mail because they are "trying not to excite Pearl's family, friends and colleagues" at The Wall Street Journal, where the 38-year-old Pearl works as a reporter.

CNN: Conflicting reports on missing reporter's fate

Other U.S. officials say there are reasons for skepticism about the e-mail, noting that it is unlike some of the previous messages from Pearl's kidnappers, in which photographs were included to prove the senders were in fact holding him.

CNN: Conflicting reports on missing reporter's fate

State Department officials said they were reviewing the e-mail, but had not yet verified that it came from the group responsible for kidnapping Pearl.

CNN: Conflicting reports on missing reporter's fate

Pakistani media reports from 2003 said "Abdul Hayee, " a Lashkar-e-Jhangvi leader, was arrested that year in Punjab and had connections to the murder of Mr. Pearl.

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