Abstract: In one aspect of the invention, an adjustable bed system is contained within a truck sleeper compartment. The adjustable bed system includes: a base frame; an upper-body frame system and a lower-body frame system, with each frame system being pivotally attached at one end to the base frame and pivotable from a horizontal position to a position which is at an acute angle with the horizontal position; a first adjustable-linkage system adjustably connecting the upper-body frame system to the base frame; and a second adjustable-linkage system adjustably connecting the lower-body frame system to the base frame.