Eat Fat, Get Thin, by Barry Groves, is essentially very similar to Atkins' OWL. It starts at 60g carbs, and allows more fruit than Atkins, with an occasional slice of bread.
I found my copy of the book in a local bookshop.

There is a website which has a lot of useful info, although it does not spell out the details of the plan the way Atkins.com does.
Here is the website: http://www.second-opinions.co.uk/eatfat.html

Cheers,

Roz