No Rest For The Wiccan

Description for NO REST FOR THE WICCAN by Madelyn Alt:

Maggie O'Neill loves her job at Enchantments as much as she loves being Indiana's newest witch. But when her family needs her, she's still willing to lend a hand--even if she has to reach, beyond the grave...

It's a long, hot summer in Stony Mill, and Maggie is busy watching TV reruns, minding the store, and figuring out her love life. Then, she reluctantly volunteers to care for her bedridden, oh-so-perfect sister, Mel. But Mel isn't the only focus of Maggie's attention. There are some strange spirits hanging about the area--and it looks like a job for Maggie and the N.I.G.H.T.S. ghost-hunting team.

Even as she tries to deal with the long dead, Maggie must also cope with the recently deceased. When a friend of Mel's loses her husband to a dreadful fall, the police call it an accidental death. Maggie's not so sure, and sets her second sights on finding a first-degree murderer...

This is #4 in A Bewitching Mystery.