"Will I have found the book I look for?"

Translation: Eu terei encontrado o livro que procuro?

[ohnitram]

Encontrei o livro que procurava?

[Paulenrique]

Nope, this structure is called "Future Perfect" in English and yours is Simple Past.

[adrianojp2000]

" terei encontrado o livro que procuro?" parece PT-PT

[aileigc]

I would even say "terei eu encontrado o livro que procuro" in PT-PT. What is the most natural BR-PT form?

[Lingledingle]

In previous examples in this section I believe that they have been using the form "procurar". Is that possible for here also?

[Paulenrique]

You can use the verb procurar but you need to conjugate it.