It serves as a semi-autobiographical account of Plath's own struggle with depression, societal expectations for women, and the transition into adulthood. The Symbol:

The "bell jar" serves as a central metaphor for Esther's depression, representing a suffocating, distorted view of the world where she feels trapped and unable to connect with others. The book remains a seminal work for its raw exploration of identity, womanhood in the 1950s, and the struggle for mental health.

Publicada originalmente bajo el seudónimo de "Victoria Lucas" por temor a herir a su familia, la novela es un retrato semiautobiográfico de los años de juventud de Plath.