'Greetings, . You wish to further develop your skills as a prospector? I can help you to do so! I possess a book that will help you to become even more skilled in your profession.
'When you have read it, return to me, and we will speak again.'
Your skills as a prospector have gone beyond your previous mastery.
You should read it and study the secrets contained within its yellowed pages.
You should speak again with the supplier now that you have read the book of prospector-lore.