Tuż przed snem czytam jeszcze jeden rozdział książki.

Because przed takes the instrumental case when it means before in a time expression.

• sen = sleep
• instrumental singular: snem

So:

• przed snem = before sleep / before going to sleep

This is a very common pattern in Polish:

• przed pracą = before work
• przed obiadem = before lunch
• przed wyjazdem = before the trip/departure

So in this sentence, snem is instrumental because it follows przed.

Tuż means something like just or right in English. It adds emphasis to przed snem.

So:

• przed snem = before sleep
• tuż przed snem = just before sleep / right before bed

It tells you that the action happens very shortly before going to sleep.

Czytam is the 1st person singular present tense of czytać (to read).

Formally, it is present tense:

• czytam = I read / I am reading

In a sentence like this, it usually has a habitual meaning:

• Tuż przed snem czytam jeszcze jeden rozdział książki. = Just before going to sleep, I read one more chapter of a book.

This sounds like something the speaker typically does, not necessarily only at this exact moment.

Also, czytać is imperfective, which fits well because reading is viewed as an ongoing/repeated activity, not as a single completed act.

Jeszcze jeden means one more, another one, or one additional.

• jeszcze = still, yet, more, another — depending on context
• jeden = one

Together here:

• jeszcze jeden rozdział = one more chapter

This is a very natural Polish way to express the idea of doing something once more:

• jeszcze jedna kawa = one more coffee
• jeszcze jeden raz = one more time
• jeszcze jedno pytanie = one more question

So in this sentence, the speaker reads one more chapter before sleep.

Not really in this sentence. Here, jeszcze means one more / another / an additional.

Compare:

• Jeszcze czytam. = I’m still reading.
• Czytam jeszcze jeden rozdział. = I’m reading one more chapter.

So the meaning of jeszcze depends a lot on what it is attached to. With jeden rozdział, it clearly means one more chapter.

Because Polish often uses the genitive case to show a relationship like chapter of a book.

• książka = book
• genitive singular: książki

So:

• rozdział książki = chapter of a book

This is very common in Polish:

• okładka książki = cover of the book
• autor książki = author of the book
• koniec filmu = end of the film

English often uses of or a noun modifier, while Polish often uses the genitive.

Polish has no articles, so there is no direct equivalent of English a / an / the.

That means:

• rozdział can mean a chapter or the chapter, depending on context.
• jeden rozdział literally means one chapter, but in natural English here it becomes one more chapter.

Polish speakers rely on context, word order, and sometimes words like ten (this/the) to clarify meaning if needed.

Yes, Polish word order is more flexible than English, because grammatical endings carry a lot of information.

The given order is very natural:

• Tuż przed snem = time expression first
• czytam = verb
• jeszcze jeden rozdział książki = object

This structure feels neutral and natural: Just before bed, I read one more chapter of a book.

Other orders are possible, but they change emphasis:

• Czytam tuż przed snem jeszcze jeden rozdział książki.
  More focus on the action I read.
• Jeszcze jeden rozdział książki czytam tuż przed snem.
  Stronger emphasis on one more chapter.

So the original sentence is a very normal, unmarked way to say it.

Literally, it is before sleep. But in natural English, it often corresponds to:

• before bed
• before going to sleep
• right before I fall asleep

The exact nuance depends on context. In everyday usage, przed snem is a standard expression for the time just before sleeping, so translating it as before bed is often the most natural choice.

Because the sentence is not talking about a future event only once. It is describing what the speaker does as a routine or general habit.

Polish present tense is commonly used for repeated actions:

• Rano piję kawę. = In the morning I drink coffee.
• Wieczorem czytam. = In the evening I read.

So:

• Tuż przed snem czytam jeszcze jeden rozdział książki. means something like Right before bed, I read one more chapter as a usual practice.

If you wanted a one-time future meaning, you would use a future form, for example:

• Tuż przed snem przeczytam jeszcze jeden rozdział książki. = Right before bed, I’ll read one more chapter of the book.

This is a question of aspect, which is very important in Polish.

• czytać = imperfective = to read, be reading, read habitually
• przeczytać = perfective = to read through, finish reading

In your sentence, czytam comes from czytać, so it presents the action as a regular activity or as an ongoing process.

If you said:

• Tuż przed snem przeczytam jeszcze jeden rozdział książki,

that would mean:

• I will read and finish one more chapter before bed.

So:

• czytam = I read / I’m reading / I usually read
• przeczytam = I will read through / finish reading

The original sentence sounds more like a routine.

Without more context, rozdział książki most naturally means a chapter of a book or a chapter from the book, depending on the situation.

Because Polish has no articles, the sentence itself does not force one single interpretation:

• jeszcze jeden rozdział książki can be:
  • one more chapter of a book
  • one more chapter of the book

Context decides whether the book is specific or not.

If the speaker wanted to make it clearly definite, they might say something like:

• jeszcze jeden rozdział tej książki = one more chapter of this book

So the original is slightly open, but in normal use people understand it from context.