When the lights go out / Mary Kubica.

"Remaking her life after her mother succumbs to cancer, Jessica uncovers a secret that undermines her sense of self even as she navigates a world made hazy by sleeplessness. Meanwhile, the heartbreak of Eden's unmet wish to have a child brings on marital stress, emotional collapse, and, finally, some dangerous behavior."--

Jessie Sloane is on the path to rebuilding her life after years of caring for her ailing mother. She rents a new apartment and applies for college-- and the college informs her that her social security number has raised a red flag. Jessie begins to doubt everything she's ever known, and develops a case of insomnia that worsens, playing with her mind. As her thoughts are hampered by fatigue, Jessie begins to see things until she can no longer tell the difference between what's real and what she's only imagined. Has Jessie's whole life been a lie, or have her delusions gotten the best of her? -- adapted from back cover