See attached for the assembly manual. Read the manual in its entirety before assembling the chair. While assembly is simple, it may make it even easier to have someone assist.
Here is an assembly video:
Take care when inserting the wooden dowels that connect the seatback to the seat bottom. Do not let the weight of the pieces stress the dowels before the screws are inserted (prop the chair against a wall, or have a partner support it while inserting the screws).
Part E chair leg left and part F chair leg right are as you stand in front of the chair looking at it (NOT as you sit in it).