Venture capital firm Risk Capital Partners (RCP) has acquired a majority share in Borders U.K. and Ireland, the books, music and DVD retail chain, from U.S.-based Borders Group.

The deal values the U.K.-Irish company at more than £75 million ($151 million).

Borders' U.K. and Ireland CEO David Roche is retaining his position at the company but is also becoming a shareholder. Borders Group itself is retaining a 17% stake in the company.

RCP, which is led by entrepreneur Luke Johnson, who is also chairman of U.K. commercial TV network operator Channel 4 Television Group, already has interests in the retail, leisure and consumer service sectors.

Its investment comes during a period of growth for the retailer, which operates 42 U.K.-based Borders superstores, plus 28 outlets in the U.K. high streets and airport shops under the brand names of Book etc. and Borders Express.

It launched its first Irish Superstore near Dublin last year and will open a new superstore in Cardiff, Wales, on Sept. 28.

"Around 30 million customers visited the stores last year, with an average dwell time of an hour," Johnson said in a statement. "We have an experienced management team now free to run the business as an independent British operation."