An e-book (or ebook, or eBook, depending upon who you ask) is the digital equivalent of a paper book. According to KiwiTech, the publishers of Classics2Go, the market for eBooks has increased more than 60% over the last six years and growth from this point is expected to be very strong.

We can reasonably connect the start of this burgeoning market to the release of the Amazon Kindle in 2007. Strong sales convinced some wary readers that this was a viable option. You could carry a few hundred books under your arm, and the reading experience was, well, acceptable. Going on a long trip? Wouldn't it be nice to take about 20 pounds of paper out of your luggage?

2007 also marked the introduction of the iPhone; it took about a year for eBook apps to appear on the iPhone. Now there are so many of them that finding the right one for your purposes can be a confusing prospect. I would like to clarify all this a bit by categorizing the four types of eBook apps, at least so far, and letting you know what you can expect from each.

In deciding upon an eBook reader you need to consider: what sort of material you will be reading, how much you are willing to spend (if anything) and the quality of the viewing experience.

Last year, Andrew Kazmierski and Phill Ryu released Classics (iTunes link). Their idea was to take a bunch of books in the public domain, 22 in the current release, and control all aspects of the user experience. We covered the first release of Classics upon its original release when its price was $2.99. Since then, the price has dropped to .99 and the number of books has increased.

This app looked so impressive that it was featured in an Apple iPhone commercial. Upon launch, the reader is presented with a nicely rendered wooden bookshelf displaying colorful dust jackets. Click on a book and start reading. There is no wait, since all the books were downloaded with the app. Future updates bring more books. The books are all the kind of classics that are on school reading lists ranging from Frankenstein and Dracula, to Hound of the Baskervilles.

The feature set is slim. Tap the right side of the screen or swipe right to left and the sepia toned pages turn using a pleasing animation. There are two buttons on the top of the screen. One brings down a maroon and gold bookmark and sends you to the bookshelf. When you click on the book again, you are brought to where you left off. The second button takes you to a table of contents. The bottom of the screen tells you the name of the chapter you are reading and what page you are on. The top of the screen displays the title of the book. Illustrations in books like Alice in Wonderland are nicely rendered, and the text is attractively formatted. A change in color of the title bar gives you an idea of where you are in the book.

You knew it had to happen, and now it has. Book retailing giant Barnes & Noble, feeling no doubt a bit of pressure from the Amazon Kindle, has launched a free eBook reader for the iPhone and reports are that it is discussing a dedicated eBook reader as well.

The B&N eReader [App Store] is free, and comes with 2 free classic titles (Jane Austen and James Fenimore Cooper), and when you register you get three more. B&N claims they have more than half a million eBooks available.

B&N also is offering a free reader for the Mac and PC so you can read your books on a desktop or laptop computer.

You can change the text color, fonts and font size, and read in portrait or landscape mode.

I have to say that using the iPhone app was a festival of frustration. To do anything I had to create an account. I couldn't even read the free books without an account. To do that I had to give my email and a password. So far, so good. Then it asked me for a good security question. I chose my middle name, but it was rejected because it didn't have enough letters. Thanks Mom and Dad. When it gave me the error, it also removed my email and password so I had to start all over again, as I had to choose another security question. It suggested I answer what kind of car I have. I did, and was promptly rejected again, and had to go back and fill out the form because it erased my already entered email and password again.

I finally straightened all that out, but was hardly in the mood to read anything. Searching for titles was kind of weird. If you select an eBook, (or any other function) you're dumped to Safari and it then says 'search eBooks for:'. Kind of odd nomenclature. Nothing about title, author or subject. I entered photography and it came up with exactly 2 books. 'Flags of our Fathers' for US$6.50 and a book called 'Photography' that was free. There was absolutely no information about the book or what was in it. And the book cover image was missing.

At this point I was mainly interested in books about anger management. but I didn't want to spend the $9.99 to get the one book on the subject in the 'vast' B&N library.

So I tried something by Stephen King. I searched for Just After Sunset. Bingo! They had it in eBook format. $22.40. Hmmm. Seems a bit high. Yep. Kindle Store for the same book -- $9.99 delivered wirelessly.

Do you get my drift here? This is a bad product debut. It has an onerous and ill-thought out sign up routine, lousy selection and many prices are way too high.

I'd suggest the B&N execs read up on competition and capitalism, if they can find any books on the subject in their damned half a million book collection.