Q-in-Law is a 1991 science fiction novel by American writer Peter David, part of the Star Trek: The Next Generation saga.

The book was ignored by the Star Trek office at Paramount, and apparently published only at the insistence of Majel Barrett, the actress who played Lwaxana on the television series, and was wife to its creator Gene Roddenberry.

[3] The Enterprise (NCC-1701-D) is assigned to diplomatic duty to host the wedding between two houses of the Tizarin, a race that lives only in space and engages in commerce.

After much pain and a broken rib, Wesley returns the slave girl to Sehra, who had been trying to get rid of her but is now happy to have her back.

The audiobook version of the novel was read by Majel Barrett and John de Lancie, who would talk in character during the sequences with Lwaxana and Q.