Do you know what a Sampo is (what it does in Finnish mythology)?
Does the word Sampo make you think of the old racist story of Little Black Sambo?
How much does the title of a second book in a series matter to you?
Note: please do not get abusive about titles. I have an acquaintance who said things to me (about a different title) like, "Did you pick that title because you want people to ignore your book?" Behavior like that is one reason this person counts as an acquaintance and not as a friend right now. If you think Sampo is a horrible title and you'd never read a book of that name, there are far better ways to express that sentiment.