Should I do it? need your advice!

Hello warriors,

I recently started a blog/list building in a weight loss niche, going a bit slow but it's only been up for a bit over a week. Anyway, today I got an email that reads along the lines:

"My name is xxxxx and I'm currently creating an ebook on weight loss. I came across your article on a number of different sites and realised that your are an expert in this niche market. I have read your article and realise that you'd be perfect for inclusion in my new ebook.

I am currently putting together an expert compendium on the subject and I'd be delighted if you would be kind enough to let me include your article in my book. Also if you have any other articles please send them over,and if they're suitable I can include them to.

Of course I would include links back to your website and this would mean free visitors to your website and publicity without you spending a dime. Not only that as I intend to market this product in a big way your reputation as an expert will be increased even further."

Aside fromthe fact it opened my eyes to an interesting way of making an ebook without doing as much work. Should I do it? I guess I am a bit annoyed that someone will make money/whatever from my work. On the other hand I might get some traffic, besides, they could just rip my article (or have it rewritten) without me being able to do anything, so a link with a possibility of some traffic doesn't sound too bad.

What do you think warriors?