The Complete Check Your Luck Agency by K.S. Augustin

After the tragic death of her parents, and with nothing left tying her to the United Kingdom, Ursula Formosa returns to her homeland of Malaysia and a job with the eccentrically-named Singapore firm, “The Check Your Luck Agency”.
What begins as an attempt to stave off boredom turns into a new way of life as the scales drop from Ursula’s eyes and she tentatively enters a realm that contains vengeful ghosts, toyol, demons, pontianak and curses, not to mention old-fashioned fraud and larceny. As she befriends bomohs, mediums and a young woman already centuries old, Ursula’s ideas of friendship expand into a fresh view of the world that surrounds her.
But she isn’t going to be left to ease into things. A criminal mastermind, who is also a powerful sorcerer, is gathering mythical creatures to help him possess every living soul in Singapore, and he isn’t about to let the members of The Check Your Luck Agency stand in his way!
This omnibus edition contains all five books in the Check Your Luck series: The Check Your Luck Agency; Return of the Hantu; Wrath of the Harimau; Night of the Pontianak; and Five Card Draw, Jinn Are High, as well as an Afterword from the author and an extensive Glossary.