To determine the spine width of a book,  yo u divide the paper PPI into the number of pages in the book. An example is a 250 page book using Plainfield opaque 50# smooth which has a PPI of 526. Divided  250 by 526 which equals  a spine width of  .4752". In this case, you would use the .5” spine. Now select the Spine width for the  book and hide the others:  Special>Conditional  Text>Show/Hide>SpineSize(-->Hide:) >S et  . Move the changed Conditional text settings to all files in your book by opening  the book file with the spine.fm still open and  File>Import>Formats  the  Conditional Text Settings (ONLY!)  to the boo k files. Draft Document for Review Decemb er 4, 201 9 1:50 pm 8456spine.fm 482 ISBN DocISBN SG24-8456-00 IBM DS8900F Architecture  and Implementation ISBN DocISBN SG24-8456-00 IBM DS8900F Architecture and  Implementation (2.5” spine)  2.5”<->nnn.n”  1315<-> nnnn pages (2.0” spine) 2.0” <-> 2.498” 1052 <-> 1314 pages