Rewrite Rule

[Carpy]

How can I create a rewrite rule in .NET so:

/book1.aspx?ID=99
/book2.aspx?ID=123
/book3.aspx?ID=1

becomes:

/99/book1.html
/123book2.html
/1/book3.html

Im working on the lines of:

~/(\d)/detail\.html
~/(*).aspx?ID=$1

Is this totally wrong?
Can I use 1 rewrite rule to acheive all three URLS?

thanks

[mrMister]

RegEx: /book(\d+)\.aspx\?ID=(\d+)
Format String: /$2/book$1.html