Question on "ti" as found on page 101

Hello, I noticed in the "Por Ejemplo" the following sentence, "Te invito a ti y nadie mas", where "ti" is the indirect object noun. I couldn't find anything in the Beginner's Spanish book before page 101 that deals with indirect object nouns and these type of forms such as "ti". Thank you for your help!

Hello Henk, Thanks for your post. I have received your email and you are right, "ti" is not taught until later on in the grammar book, my apologies for that... I guess sometimes we do get a little ahead of ourselves in the examples. Kind regards Maurico.