हालाँकि पुस्तकालय छोटा है, फिर भी किताबें हैं।

Hindi often likes a correlative pair here:

• हालाँकि = although / even though
• फिर भी = still / nevertheless / even so

So हालाँकि ... फिर भी ... is a very natural pattern meaning:

• Although X, still Y
• Even though X, Y nevertheless

In English, using both can sound a bit heavy, but in Hindi it is completely normal.

So:

• हालाँकि पुस्तकालय छोटा है, फिर भी किताबें हैं। = Although the library is small, there are still books.

You may also hear shorter versions in real speech, but this full pattern is very common and clear.

हालाँकि is a conjunction meaning:

• although
• though
• even though

It introduces a clause that sets up a contrast.

In this sentence:

• हालाँकि पुस्तकालय छोटा है
  = although the library is small

It prepares the listener for something slightly unexpected in the next part.

फिर भी means:

• still
• even then
• nevertheless
• all the same

It shows that the second part remains true despite the first part.

So:

• पुस्तकालय छोटा है = the library is small
• फिर भी किताबें हैं = even so, there are books

It emphasizes contrast.

पुस्तकालय means library.

It is a more formal or standard Hindi word:

• पुस्तक = book
• -आलय = place/home for something

So literally, it is something like a place of books.

In everyday speech, many speakers also say:

• लाइब्रेरी

Both are understood, but पुस्तकालय sounds more formal, textbook-like, or official.

Because पुस्तकालय is treated as a masculine singular noun, so the adjective agrees with it.

• masculine singular: छोटा
• feminine singular: छोटी
• masculine plural: छोटे

So:

• पुस्तकालय छोटा है = The library is small

If the noun were feminine, you would use छोटी instead.

In Hindi, noun gender is something you often have to learn along with the word. There is not always an obvious rule from meaning alone.

In this sentence, the clue is the adjective:

• छोटा shows masculine singular agreement

So the sentence itself tells you that पुस्तकालय is being treated as masculine.

This is a very common learning point in Hindi: adjectives and verbs often help reveal the gender and number of the noun.

Because किताबें is plural.

• किताब = book
• किताबें = books

When the subject or thing being talked about is plural, the verb होना in the present tense becomes हैं, not है.

So:

• किताब है = there is a book / the book is
• किताबें हैं = there are books

That is why the sentence ends with हैं.

Hindi usually does not need a dummy subject like English there.

English says:

• There are books

But Hindi often simply says:

• किताबें हैं
• literally: books are

This is a very important difference from English. Hindi does not need an extra filler word like there in this kind of sentence.

So किताबें हैं naturally means:

• there are books
• books exist
• books are present

depending on context.

Hindi does not normally use articles the way English does.

English distinguishes:

• a library
• the library

But Hindi usually relies on context instead.

So:

• पुस्तकालय छोटा है can mean the library is small or a library is small, depending on context
• किताबें हैं can mean there are books or the books are there, depending on context, though here it clearly means there are books

This is normal in Hindi. Learners often want to insert article-like meanings, but Hindi usually leaves them unstated.

A rough literal breakdown is:

• हालाँकि = although
• पुस्तकालय = library
• छोटा = small
• है = is
• फिर भी = still / nevertheless
• किताबें = books
• हैं = are

So literally:

• Although library small is, still books are.

That sounds unnatural in English, but it shows the Hindi structure clearly.

Sometimes learners want to turn this into:

• हालाँकि ..., लेकिन ...

People may understand it, but the most natural pairing here is:

• हालाँकि ... फिर भी ...

Why?

• लेकिन mainly means but
• फिर भी means still / nevertheless, which matches the concessive idea of हालाँकि better

So the sentence as given is very idiomatic and well-formed.

The comma is helpful, but not always absolutely necessary.

It marks the pause between the two parts:

• हालाँकि पुस्तकालय छोटा है, फिर भी किताबें हैं।

In speech, you would normally pause slightly after है. In writing, the comma makes that structure clearer.

So it is good style here, especially in teaching or formal writing.

Yes, it is grammatical and natural, especially in clear, careful Hindi.

That said, in casual everyday speech, speakers might choose simpler wording depending on what they want to emphasize. For example, they might use a sentence with लेकिन or rephrase it more conversationally.

Still, the pattern:

• हालाँकि ..., फिर भी ...

is absolutely standard and useful to learn, because it teaches a very common way to express contrast despite expectation.