Abstract: A sample book binding system for retaining a plurality of sample sheets includes a plurality of rotatably interlocked sheet holding members arranged in side by side relationship. The sheet holding members are provided with a plurality of linking segments which are interdigitated to provide an aligned axial bore for receiving a pintle. At least two adjacent linking segments are spaced apart to provide an opening which captures a deformed section of the pintle for releasably locking the pintle within the linking segment. The removal and insertion of additional sheet holding members may be accomplished upon removal of the pintle.