Jakoś znajdę tę książkę.

Here jakoś means somehow, one way or another, or I’ll manage somehow.

It does not usually describe the exact method. Instead, it gives a feeling of confidence or determination despite uncertainty:

• Jakoś znajdę tę książkę. = I’ll find this book somehow / one way or another.

So the speaker is not saying how they will find it, only that they believe they will.

Znajdę is the 1st person singular form, meaning I will find.

Its infinitive is znaleźć = to find.

This verb is perfective, so its present-tense-looking forms usually have future meaning:

• znajdę = I will find
• znajdziesz = you will find
• znajdzie = he/she/it will find

This is very common in Polish: perfective verbs use present-type endings to talk about the future.

Because książka is the direct object of the verb znaleźć (to find), so it must go into the accusative case.

• nominative: książka = book
• accusative: książkę = book as the object of the action

So:

• To jest książka. = This is a book.
• Znajdę książkę. = I will find a/the book.

For the same reason: the phrase is in the accusative case.

• nominative: ta książka = this book
• accusative: tę książkę = this book as the object

So in Jakoś znajdę tę książkę, both words change because the whole noun phrase is the object.

It is accusative singular feminine.

Why?

• książka is a feminine noun
• it is singular
• it is the direct object, so it takes the accusative

That gives:

• ta książka → nominative
• tę książkę → accusative

Yes. Polish word order is fairly flexible, but changing it can shift emphasis.

The neutral version here is:

• Jakoś znajdę tę książkę.

Other possible orders include:

• Tę książkę jakoś znajdę. — stronger focus on this book
• Znajdę jakoś tę książkę. — possible, but less natural in many contexts
• Tę książkę znajdę jakoś. — also possible, with different emphasis

So the sentence is not only about grammar; word order also affects what sounds most natural and what is being emphasized.

Not always, but in this sentence it sounds fairly reassuring: I’ll manage somehow.

Depending on context, jakoś can also sound:

• uncertain
• vague
• resigned
• practical

For example:

• Jakoś to będzie. = It’ll work out somehow.
• Jakoś się dogadamy. = We’ll figure something out somehow.

So here it suggests determination, but with no specific plan.

In standard written Polish, the expected form here is tę książkę.

You may hear many native speakers say:

• tą książkę

in everyday speech, but traditionally and formally, after a verb like znajdę, the standard accusative form is:

• tę książkę

So for learners, tę książkę is the safest and best form to use.

A practical pronunciation is roughly:

• znajdę ≈ znai-deh with a nasalized ending

A few helpful notes:

• znaj- sounds a bit like English znai in Snide but with z+n at the start
• dę contains ę, which is a nasal vowel
• before the end of a word, ę is often pronounced less strongly nasal than learners expect

You do not need to over-pronounce the nasal vowel. A natural pronunciation matters more than making it extremely nasal.

Not exactly.

• Jakoś znajdę tę książkę. = I’ll find this book somehow.
  Focus: successful result

• Będę szukać tej książki. = I will be looking for this book.
  Focus: the process of searching

This is an important Polish aspect contrast:

• znaleźć / znajdę = perfective, result-oriented
• szukać / będę szukać = imperfective, process-oriented

So the original sentence suggests confidence that the speaker will actually succeed.