El prólogo me gustó más que la contraportada, porque explica mejor la historia.

Because gustar works differently from to like in English.

In Spanish, gustar literally works more like to be pleasing to someone. So:

• Me gustó el prólogo = The prologue pleased me / I liked the prologue

Here:

• me = to me
• gustó = was pleasing
• el prólogo = the thing that caused the feeling

So the subject is el prólogo, not yo.

Me is an indirect object pronoun, meaning to me.

So:

• me gustó = it pleased me / I liked it

Other forms would be:

• te gustó = you liked it
• le gustó = he/she liked it
• nos gustó = we liked it

In this sentence, me shows who had the reaction.

Because the thing being liked is singular: el prólogo.

With gustar, the verb agrees with the thing that is pleasing, not with the person who likes it.

• El prólogo me gustó → singular subject → gustó
• Los prólogos me gustaron → plural subject → gustaron

So gustó matches el prólogo.

This is the normal way to make a comparison of preference:

• X me gustó más que Y = I liked X more than Y

So:

• El prólogo me gustó más que la contraportada = I liked the prologue more than the back cover

Here, más que means more than.

La contraportada usually means the back cover of a book.

It is a feminine noun, which is why it takes:

• la contraportada

So in this sentence, the speaker is comparing the prologue with the back cover text/design/content.

Because Spanish often uses the present tense to describe something that is generally true now about the object.

So:

• me gustó = past reaction: I liked
• porque explica mejor la historia = present description: because it explains the story better

This means the speaker liked it, and the reason is that the prologue does a better job of explaining the story.

This mix of tenses is very natural in Spanish.

The subject is understood to be el prólogo.

So the full idea is:

• El prólogo... explica mejor la historia

Spanish often leaves the subject unstated when it is clear from context.

So porque explica mejor la historia means:

• because it explains the story better

where it = the prologue.

Mejor means better.

In this sentence:

• explica mejor la historia = it explains the story better

It is modifying the verb explica, so it works like an adverb here.

Compare:

• un libro mejor = a better book
• explica mejor = explains better

Because Spanish often drops subject pronouns when they are not needed.

The verb form explica already tells you it is he/she/it explains, and the context makes it clear that it refers to el prólogo.

So Spanish prefers:

• porque explica mejor la historia

rather than:

• porque él explica mejor la historia

Using él here would usually sound unnecessary unless you wanted special emphasis.

In this sentence, la historia means the story.

Spanish historia can mean:

• history
• story

The context tells you which one is meant. Since we are talking about a book’s prólogo and contraportada, story is the natural meaning here.

Yes. That is also natural.

Both of these are fine:

• El prólogo me gustó más que la contraportada
• Me gustó más el prólogo que la contraportada

The emphasis is slightly different:

• El prólogo... puts the focus first on the prologue
• Me gustó más el prólogo... starts with your reaction

Both mean essentially the same thing.

Because the stress falls on the pró- syllable: PRÓ-lo-go.

Without the accent, Spanish stress rules would make it sound different. The written accent shows the correct pronunciation.

Likewise:

• gustó has an accent because the stress is on the last syllable: gus-TÓ

Accent marks in Spanish are important because they show pronunciation and sometimes distinguish forms.

Yes, porque is one word here because it means because.

• porque = because
• por qué = why

So:

• ...porque explica mejor la historia = ...because it explains the story better

A learner often mixes these up, so it is useful to remember:

• answer/reason → porque
• question → por qué