There’s a Ghost in My PC
From the blurb:
Twelve-year-old Madhu’s laptop houses a ghost. She keeps this a secret—after all, who would believe her if she told them?
But her younger sister Kumuda knows something fishy is afoot. She fancies herself as a bit of an investigator, which lands her in a lot of trouble.
This book tells the funny and interesting story of these two girls and their family and friends.