Clickbank + Lulu (is this ethical?)

[Haunted Ghost]

You write your own short yet useful enough version of a clickbank ebook (that you didn't write) and then self publish it on lulu.com. You don't commit any copyright infringement or any copying. You just write your own ebook 1/3 the length of the clickbank ebook that your are affiliate marketing on your landing site.

Now, in whatever literature (ad copy, review) you have for promoting the clickbank product (which as I already mentioned, is not yours) you also have a link to your own ebook in your own lulu.com store where your version is only 1/3 the price (of the one your are affiliating) yet almost as good as it, because you have already read that ebook and have developed your own version which is really an improved version (but cheaper and shorter) though not copied.

What's the ethics on this. Also, how good a marketing strategy is this? You're essentially using a "trade up" tactic in which your shorter ebook is the Honda Civic while the longer ebook (the one that is not yours but which you are merely affiliating) as the Accord or even the Acura.

The idea is that you are using your own ebook of the exact same subject as a cheap sample in which you get to make some money.

[GoodCallYouWin]

Is unethical to 'promote' their product simply to sell yours and also unethical to simply steal some one else's work and reword it.