Who is Santiago and how is he introduced in the beginning of the storyin Coelho's The Alchemist?

Santiago is the main character n the book The
Alchemist.  He is introduced in the book by his name in the first line.  The
book tells that he has a herd and he spends the night at an abandoned church.  He is a
reader because he thinks about needing to read thicker books which he also uses for a
pillow.

Santiago is awakened during the night and he lays
thinking about a reoccurring dream.  He awakens his sheep and carries a crook.  He reads
to his flock with the notion that they may understand what he reads to
them. 

Santiago is in love with a beautiful
girl.