Work and Force

If a book is raised from the floor to the table,

then the gravity force on the object or the weight of the object $\vec{mg}$ is vertically downwards and

the displacement $\vec{s}$ that is working vertically upwards.

In this case, gravitational force and displacement are opposite directed.,

so for gravitational force, it will be a $\color{#D61F06}\text{negative work}$ .

Also, The force that you used to raise the object upwards will be a $\color{#20A900}\text{positive work}$ for your applied force.