Curses! by Graham Nelson

"As "Curses" opens, you're hunting about in the attic of your family home, looking for a tatty old map of Paris (you're going on holiday tomorrow) and generally trying to avoid all the packing. Aunt Jemima is potting daisies and sulking; the attics are full of endless distractions and secrets; Greek myths, horoscopes, sixth-century politics, a less than altogether helpful demon, a mysterious bomb plot, photography, ritual, poetry and a dream or two all get in your way; and somehow you keep being reminded of your family through the ages, and all its Curses... ...could it be that even you are Cursed?" [--blurb from The Z-Files Catalogue]