Spanish language Q&A Forum

hi team,

I have some questions.

´Es muy agradable porque la vuelta al frío es mucho más amena de esta manera.´ why is mucho being used instead of muy? 
I thought that it will be used to describe ´amena´, an adjective.

´que ocurre a finales de septiembre ´. why is finales the plural being used and without articles ´los´?

Thanks in advance.

Re les vs los below.. les is incorrect because ver is a transitive verb, correct? 

Re my question below is les incorrect because ver is intransitive? 

Sonia, De verdad. No podías guardártelo para ti

hi, in the case of saying ´en algún libro´etc where we mean some book, a book non specifically, can we use ´un´ in place of ´algún´?