Amazon.com

(AMZN) - Get Report

, a pioneer in electronic commerce whose stock has soared and soured more than the stock of most other tech firms, has a lot going for it.

The bookseller now offers everything from

Apple

(AAPL) - Get Report

computers to exhaust systems for

Harley-Davidson

(HOG) - Get Report

motorcycles. The latest version of Amazon's Kindle digital reader appears to be hit. And to serve those with less inclination to read, the company is taking dead aim to become the kingpin in the mega-profitable field of electronic gaming. Last week, Amazon said it's targeting the "trade-in" market dominated by

GameStop

(GME) - Get Report

.

But anyone interested in Amazon as an investment has to ask whether the stock is worth more than 10 times book value and 43 times this year's projected earnings. Apple's price-to-earnings ratio is 15.6,

Google's

(GOOG) - Get Report

is 18.4. Even the best performer on the

S&P 500

index in the past 12 months,

Family Dollar

(FDO)

, is selling for 17.4 times earnings.

While Amazon's revenue jumped 29.8% last year, when the current recession already was taking hold, analysts' consensus is that growth in net income will slip to $1.48 a share for fiscal 2009 from $1.49 in fiscal 2008. As economic growth probably will resume next year, analysts predict the online merchant's earnings will grow 29.7% in 2010, as can be seen in the accompanying statistical profile below.

Although Amazon's Kindle reader is gaining attention as a fashionable tech accessory, there's little in the firm's business model that could be mistaken for rocket science. Despite the company's attempt to protect some of its online retailing procedures with controversial patents, few real barriers exist to prevent competitors from entering its online retailing domain.

Amazon dwarfs Internet retailers such as

Overstock.com

(OSTK) - Get Report

-- $19.2 billion in annual revenue versus $834.4 million. But taking online marketing very seriously are "bricks and mortar" giants such as the $375.4 billion revenue

Wal-Mart

(WMT) - Get Report

, $72.5 billion

Costco

(COST) - Get Report

and $40 billion

Best Buy

(BBY) - Get Report

.

It has been a wild ride for long-term holders of Amazon stock. Its shares topped $106 in late 1999, during the tech bubble, before changing hands below $6 in September 2001. The shares stormed back to more than $100 in late 2007 and then drifted into the $30s last year before recovering to their recent range in the mid-$60s.

The stock's volatility is a factor in Amazon's "risk grade" of D-plus from TheStreet.com Ratings. Factors such as its valuation metrics, current financial position and consensus earnings growth estimates are weighed by TheStreet.com Ratings quantitative evaluation model in determining an "overall grade" of B-minus, equating with a soft "buy" recommendation.

Richard Widows is a senior financial analyst for TheStreet.com Ratings. Prior to joining TheStreet.com, Widows was senior product manager for quantitative analytics at Thomson Financial. After receiving an M.B.A. from Santa Clara University in California, his career included development of investment information systems at data firms, including the Lipper division of Reuters. His international experience includes assignments in the U.K. and East Asia.