Meni se sviđa ova knjiga.

Because meni is the dative form of ja (I).

With sviđati se, Serbian does not literally say I like this book. The structure is closer to:

• This book is pleasing to me

So the person who experiences the liking goes in the dative:

• ja = I
• meni / mi = to me

That is why you get:

• Meni se sviđa ova knjiga.

Se is a short reflexive particle that is part of the verb sviđati se.

You should learn this verb as a whole:

• sviđati se = to be pleasing, to appeal, to like

So in this sentence, se does not mean himself/herself in the usual English sense. It is just part of how this verb works.

Examples:

• Sviđa mi se film. = I like the film.
• Ne sviđa mi se. = I do not like it.

Because the verb agrees with the thing being liked, not with the person who likes it.

In Meni se sviđa ova knjiga, the subject is ova knjiga (this book), which is singular. Therefore the verb is singular:

• sviđa = singular

Compare:

• Sviđa mi se ova knjiga. = I like this book.
• Sviđaju mi se ove knjige. = I like these books.

So the verb changes according to book/books, not according to me.

Because ova knjiga is the grammatical subject of the sentence.

Again, Serbian is expressing something like:

• This book pleases me

So:

• ova knjiga = subject → nominative
• meni = indirect object / experiencer → dative

That is why knjiga stays in the nominative, not in the accusative.

Because knjiga is a feminine noun.

The demonstrative this must match the noun in gender, number, and case:

• ovaj = masculine singular
• ova = feminine singular
• ovo = neuter singular

Since knjiga is feminine singular nominative, the correct form is:

• ova knjiga

Yes. Mi is the unstressed short form, and meni is the stressed/full form.

So both are possible:

• Sviđa mi se ova knjiga. = the most natural everyday order
• Meni se sviđa ova knjiga. = more emphasis on me
• Ova knjiga mi se sviđa. = also possible

Use meni when you want contrast or emphasis, for example:

• Meni se sviđa, ali njemu ne.
• I like it, but he does not.

It is correct, but in everyday speech the most neutral version is often:

• Sviđa mi se ova knjiga.

The version with meni at the beginning usually adds emphasis or contrast:

• Meni se sviđa ova knjiga. = I like this book.

Serbian word order is more flexible than English, but the placement can change the emphasis.

Common versions:

• Sviđa mi se ova knjiga. = neutral
• Meni se sviđa ova knjiga. = emphasizes me
• Ova knjiga mi se sviđa. = emphasizes this book

Both can often translate as I like, but they are not used in exactly the same way.

• sviđati se = to appeal to someone, to be pleasing
• voleti / volim = to love, like, be fond of

With things such as books, films, songs, clothes, colors, many speakers very naturally use sviđa mi se:

• Sviđa mi se ova knjiga.

You can also say:

• Volim ovu knjigu.

But the nuance is a bit different:

• sviđa mi se ova knjiga = this book appeals to me / I like it
• volim ovu knjigu = I like this book very much / I am fond of it

Also notice the grammar changes:

• Sviđa mi se ova knjiga. → noun in nominative
• Volim ovu knjigu. → noun in accusative

You would need plural agreement:

• Sviđaju mi se ove knjige.

Why?

• ove knjige = these books → plural
• therefore the verb becomes sviđaju

So:

• sviđa = singular
• sviđaju = plural

Yes:

• Ne sviđa mi se ova knjiga. = I do not like this book.

Notice that ne goes before the verb:

• ne sviđa

The rest of the structure stays the same.

The dictionary form is sviđati se.

That is the imperfective verb, and it is the one learners usually meet first in this pattern.

You may also see the perfective partner:

• svideti se

Very roughly:

• sviđati se = to like / to be pleasing, often general or ongoing
• svideti se = to come to like / to appeal at a particular moment

Examples:

• Sviđa mi se ova knjiga. = I like this book.
• Svidela mi se ova knjiga. = I liked this book. / This book appealed to me.

A rough English-friendly guide is:

• sviđa ≈ SVEE-ja

But the đ is important. It is a soft sound, similar to the sound in British duke or like a very soft j/dj combination.

So:

• đ is not the same as plain d
• sviđa is not pronounced like svida

Also:

• lj in sviđa is not present here, so do not overcomplicate it
• the sv cluster at the beginning is normal in Serbian

Not entirely, unless the meaning is already very clear from context and even then you normally need the dative clitic.

Usually you would say:

• Sviđa mi se ova knjiga.

You can leave out the full form meni, but you normally keep the short form mi.

So:

• Meni se sviđa ova knjiga. = correct
• Sviđa mi se ova knjiga. = correct
• Sviđa se ova knjiga. = usually incomplete if you mean I like this book

The sentence normally needs someone that the book is pleasing to.

It means book, yes, but in this sentence what matters grammatically is that it is:

• feminine
• singular
• nominative

That affects both:

• ova → must be feminine singular nominative
• sviđa → must be singular because knjiga is singular

So a learner should not just memorize vocabulary here, but also notice the grammar pattern built around the noun.