Hello. I'm hoping someone could help me out. I have a 4 volume set of Giant Little Golden Books. Published 1980, Sydney/Auckland It says in Foreword ..that this is the first time using the large format? Comes in very attractive sleave that holds the 4 volumes. Volumes are titled Our Animal Friends, The World around us, Numbers And Things That Work, Bedtime Stories and Rhymes. All the well known and liked titles in each series. What would it be worth? and is it sought after? I'm having difficulty finding anything out about the book. Would appreciate some words from the experts Regards Emile