Spanish AQA A2 quick question please!

Out of the three set texts do you have to read all three books?

(they are: en la ardiente oscuridad, como aqua pa' choco., y la casa de bernarda alba)

I need to order them on amazon today and don't know if I need to read them all.

and also if you also don't mind telling me how the literary topics work please? do you you choose the topic? or do you have to read one or two texts on the same topic?

por ejemplo:

La guerra y el conflicto en la literatura espanola, suggested texts are:
Azuela M: los de abajo
Cela C J: La familia de Pascual Duarte
Castresana: El otro árbol de Guernica
Fermín Gómez F: las bicicletas son para el verano
Martínez Reverte: Gálvez en Euskadi

If I chose this topic do I need to read all 5 books?

How many topics are you choosing? and how many books are you reading on each?

Thanks again!