The Apothecary Diaries, Vol. 4 (Light Novel)

After breaking a 'curse' on the imperial heirs, a palace servant with training in herbal medicine is promoted up the ranks to food taster... and right into the thick of palace intrigue! 

Outside of her official duties, Maomao helps friends and acquaintances in the rear palace. Xiaolan needs a new job after her term of service ends, and Consort Lishu is convinced she's seen a ghost! Then, when complications arise with Gyokuyou's pregnancy, Maomao realizes her skills are inadequate to handle the life-threatening situation. Although Maomao knows someone who can help, they haven't been welcome in the rear palace for a very long time... Maomao also begins to connect the dots between seemingly unrelated incidents in the rear palace. Will knowing too much put her life in danger?