Interlocking-continuous base bookends

An interlocking continuous base bookend device comprising:

• a) a first and second upright end unit each having a longitudinal base leg of uniform thickness so that when joined they form a level base;
• b) said first upright end unit longitudinal base leg having a female cut-out opening surrounded on three sides by oppositely positioned base fingers and a base opening stop between said fingers at said first upright end unit;
• c) said second upright end unit longitudinal base leg having a male base-tongue;
• d) said first upright female longitudinal base leg cut-out opening fashioned to receive said longitudinal leg male base-tongue so that a continuous base is formed;
• and
• e) interlocking means for releasably coupling and readjusting the width of said continuous base comprising shapes formed along the outside edges of said longitudinal leg male base-tongue conformed to releasably correspond with shapes formed along the adjacent inside edges of said female longitudinal base leg cut-out opening so that said upright end units are adjustably joined by meshing said shapes and the width of said device fixed.