All About Sam (1988) is a children's novel by Lois Lowry.

It is the first in a series of four novels about the character Sam Krupnik; a character Lowry had developed earlier in her books on Sam's older sister, Anastasia Krupnik.

[2] A 1997 assessment of the novel by Joel Chaston stated that the work had wide appeal to young readers, and whereas the related Anastasia series books had appealed more to girls, the Sam Krupnik series expanded readership to audience of all genders.

He is very smart, and from the day he was born, Anastasia was jealous.

The story is told from Baby Sam's viewpoint and consists of his observations, feelings and thoughts, in the manner of the 1989 film Look Who's Talking.