the bookmatch in this case means that the tips are 'mirrored', ie: they are identical as possible. the 12 strips that make up the two tips are taken from adjacent sections of the culm(s) of bamboo. the idea is to make the two tips ACT as identical as possible in use. it is not a required part of making a top quality rod but it is a sign that the maker pays attention to the details of construction
splinter