Form 1 starts to consider some well-known books (8)
I believe the answer is:
classics
'well-known books' is the definition.
'form 1 starts to consider some' is the wordplay.
'form' becomes 'class' ('class' can be a synonym of 'form'**).
'c' becomes 'i' ('i' can be a synonym of 'c').
'starts to' indicates taking the first letters.
The initial letters of 'consider some' is 'cs'.
'class'+'i'+'cs'='CLASSICS'
(Other definitions for classics that I've seen before include "Greek and Latin studies" , "Literary works of ancient Greece and Rome" , "great literary works" , "number of races" , "The study of ancient Greek and Roman culture" .)