Harmony publishers provide bookworm bookshop with a variety of books. The bookshop begins selling harmony's books at a discounted price. Harmony contacts the bookshop and asks them to sell the books at their recommended retail price. Bookworm refuses. Harmony withholds the supply of books until the discounting stops, placing the bookshop in a difficult financial position.

Has the bookworm bookshop done anything unlawful? Has harmony publishers done anything unlawful?