a caballo regalado no se le ve el colmillo

It's fiction. Just by the nature of most works titled like this, they tend to be fictional.

Well, 'el caballo de troya' is fiction. Fiction is all about creating stories that may not be based on real - life events in a literal sense. This work, like many fictional works, can take the reader on a journey through a world that is crafted by the author's creativity. It likely has fictional characters, settings, and plotlines that are not based on historical facts in a straightforward way.

The Alcazar does not surrender.

One example could be: 'As the enemy army surrounded the ancient Alcazar, the soldiers inside vowed that the Alcazar no se rinde. They fought bravely against all odds.'

Well, I once heard about a person's first time skydiving. They were terrified at first, but as soon as they jumped out of the plane, all that fear turned into pure exhilaration. The feeling of the wind rushing past and seeing the world from such a high altitude was a life - changing experience for them.

They could interact through a series of codes and puzzles. For example, Carmen Sandiego leaves a trail of encrypted messages that only Le Shiv and El Topo, with their own set of skills, can decipher. This would lead them on a chase to find Carmen and join her in her next adventure.

Maybe there could be a plot where Le Shiv and El Topo are having relationship problems. Carmen Sandiego, being the wily and intelligent character she is, helps them work through their issues while also enlisting their help for one of her heists. This could show a more human side to Carmen and also explore the dynamics of the relationship between Le Shiv and El Topo.

El Cid was a Spanish hero. He was a military leader in medieval Spain who fought against the Moors.

Yes, El Dragon could be a novela. But it depends on the specific context and your understanding of what constitutes a novela.

Yes, El Filibusterismo is indeed a novel. It was written by Jos茅 Rizal, a prominent figure in Philippine literature.