A Tangled Web is a novel by L. M. Montgomery. It is one of the few books she published that was written mainly for adults. It centers on a community consisting mainly of two families, the Penhallows and the Darks. Over three generations, 60 members of the Penhallow family have married 60 members of the Dark family, creating a tangled web of relationships and emotions.

No amount of drama between the Dark and Penhallow families can prepare them for what follows when Aunt Becky bequeaths her prized heirloom jug - the owner to be revealed in one year's time. The intermarriages, and resulting fighting and feuding, that have occurred over the years grow more intense as Gay Penhallow's fiancé leaves her for the devious Nan Penhallow; Peter Penhallow and Donna Dark find love after a lifelong hatred of each other; and Joscelyn and Hugh Dark, inexplicably separated on their wedding night, are reunited.

Hopes and shortcomings are revealed as we follow the fates of the clan for an entire year. The legendary jug sits amid this love, heartbreak, and hilarity as each family member works to acquire the heirloom. But on the night that the eccentric matriarch's wishes are to be revealed, both families find the biggest surprise of all.

A Tangled Web is a novel by Canadian author L. M. Montgomery.