Best-selling author E.L. James collaborated with Swedish fashion house KappAhl to create a range of lingerie based on her erotic novel, Fifty Shades of Grey.

Available in black or burgundy satin and grey lace, the company said the items are full of references to the book's characters Christian Grey and Anastasia. Those characters will be played by Jamie Dornan and Dakota Johnson respectively in the novel's film adaptation, scheduled for a 2015 release.

The lingerie collection includes bras, briefs, negligees, dressing gowns and even masks. The collection is available for purchase online and in select stores.

Speaking about the new range, E.L James said "It has been incredibly exciting and interesting to be involved in the process, from the production of the concept through the design to the final collection."

"I wanted to do T-shirts and mugs and that was it, but KappAhl came with their proposal and they were so imaginative...and I just thought, 'yeah OK this is gorgeous. Let's go with it,' " she added. "I have been deeply involved at all stages, and my thoughts and suggestions are clearly visible in the collection's garments."

The lingerie campaign features a plus size woman and the garments come in a range of sizes. James spoke about why that was "important" to her going forward with the collaboration, saying "because woman are all shapes and sizes."

"What happens generally in the fashion industry is they want the clothes to look great [so] they put them on very young women, very small women...and it excludes actually the majority of women out there," she explained. "So you feel completely self-conscious about you. It's how women look at themselves, it's not how men see them, at all. 

Equally excited with the campaign was Carina Ladow, vice president of range and design at KappAhl.

"Both E L James and KappAhl felt that it was important for all women to be able to feel comfortable and beautiful while wearing the garments," Ladow said, according to Daily Mail. "Not surprisingly, the garments come in shades of grey with complementary colors such as red and black. The garments are embellished with lace details for a romantic feeling."

"We are always looking for new ways to interest our customers and this is the first time that KappAhl has entered into a collaboration of this type," she added. "It gives us an opportunity to offer our customers a feeling of luxury and frivolity in their everyday lives. The end result is better than we could have ever hoped and we are very happy with the enthusiasm and commitment shown by E L James."

The film adaptation of Fifty Shades of Grey is expected to be released on Feb. 15, 2015.