As its title suggests, the book is ostensibly Tristram's narration of
his life story. But it is one of the central jokes of the novel that he
cannot explain anything simply, that he must make explanatory diversions
to add context and colour to his tale, to the extent that Tristram's own
birth is not even reached until Volume III.Consequently, apart from
Tristram as narrator, the most familiar and important characters in the
book are his father, Walter, his mother, his Uncle Toby, Toby's servant
Trim, and a supporting cast of popular minor characters, including the
chambermaid, Susannah, Doctor Slop, and the parson, Yorick, who later
became Sterne's favourite nom de plume and a very successful publicity
stunt. Yorick is also the protagonist of Sterne's second work of fiction
A Sentimental Journey Through France and Italy.Most of the action is
concerned with domestic upsets or misunderstandings, which find humour
in the opposing temperaments of Walter splenetic, rational, and somewhat
sarcastic and Uncle Toby, who is gentle, uncomplicated, and a lover of
his fellow man.