Here's why:
* Subject: "A book about life and career" is the subject of the sentence, telling us what the sentence is about.
* Predicate: The predicate is the part of the sentence that tells us something about the subject. The predicate needs a verb to complete it.
To make this a complete sentence, we need to add a verb. Here are a few possibilities:
* "Also among my baseball treasures is a book about life and career." (This uses the verb "is" as the predicate)
* "Also among my baseball treasures, I found a book about life and career." (This uses the verb "found" as the predicate)
Let me know if you have any more sentences you'd like to analyze!