Ladybird Books is a London-based publishing company, trading as a stand-alone imprint within the Penguin Group of companies. The Ladybird imprint publishes mass-market children's books.

Penguin Random House LLC is an Anglo-American multinational conglomerate publishing company formed on July 1, 2013, with the merger of Penguin Books and Random House. Penguin Books was originally founded in 1935 and Random House was founded in 1927. It has more than 300 publishing imprints. Along with Simon & Schuster, Hachette, HarperCollins and Macmillan Publishers, Penguin Random House is considered one of the 'Big Five' English language publishers.