Learn Spanish (Latin America): Ese libro no está en ninguna parte.

In Spanish, if a negative word like ninguna (none/not any) comes after the verb, you must put another negative word like no before the verb. So, literally, this sentence says 'That book is not in no part.' English avoids double negatives, but Spanish requires them here!

Why is it ninguna instead of ningún?

The word ninguno has to match the gender of the noun it describes. Here, it describes parte, which is a feminine word (la parte). Therefore, it changes to ninguna.

Why does the English translation say 'to be found' when there's no verb for 'found' in the Spanish sentence?

The Spanish phrase en ninguna parte literally translates to 'in no part' or 'nowhere.' Saying no está en ninguna parte (it is nowhere) is the natural Spanish equivalent of the English idiom 'it is nowhere to be found.' You don't need a literal translation of the verb 'to find' here.

Why use está instead of es for a physical object like a book?

We use está because the sentence is talking about the book's location (or lack thereof!). Remember the rule: when talking about the physical location of people, places, or things, always use estar, even if that object is permanent.