For anyone familiar with the passport process in the United States: I have a (valid, i.e. non-expired, etc.) passport card. However, as I will be traveling out of the continent I need a passport book. My first guess was to use the DS-11 form for a new passport book, but upon completing the state.gov's online application, it created a DS-82 form out of my information, and requested that I send my passport card along with a check and this form to the appropriate address.
My question is: is this a valid method of obtaining a passport book, even if I've never owned a passport book before? I thought if I never had a book I must fill out DS-11. But does my passport card count as a variant of this, so getting a book is like "renewing" in a way? I do not wish to renew my passport card since it did not expire.