Put a formmail script on your website's CGI BINfor METHOD= include the full URL of the script
e.g.
http://www.yoursite.com/cgi-bin/formmail.pl
Use TARGET=_blank in the FORM tag
That should kinda do it
There is a formmail script here,http://www.worldwidemart.com/scripts/ you may need to make some mods
One issue is that formmail scripts can be abused, as somebody at another site can link to your script and take advantage of it for spamming or to save their bandwidth and use yours.
Most formmails scripts allow you to restrict the script to being operated from a form on your domain. However if you use this security feature then the form won't work in an E-Book.
A sort of work round to keep some security while removing the referrer page feature is to call your script something obsure like adaasdasfdsg73.pl instead of formmail.pl - but it is still a little risky...
The safest thing would be to open a web browser window with a link, and put the form page on a page on your site, rather than directly inside the E-Book
HTH