A simple book repair manual on the web, written by staff at Dartmouth College and funded by National Park Service's National Center for Preservation Technology and Training
To mend ripped pages, use only filmosplast P tape, which will not dry out or discolor with age. This can be purchased from any library or archival supply catalog. Use paper mending tape for tears on a page, hinging tape for tipping in pages, reinforcing folds. Each costs about $ 20.00 for a 164" roll. (P is transparent; P-90 is white, opaque) . Tears can also be repaired with Japanese paper and starch paste, although we do not do that. Instructions. Gaylord also supplies an online instrucution page to demonstrate how to tip-in a page.
To mend a book broken away from spine or spine cover torn off on one side: filmoplast SH tape is a self-adhesive white linen fabric that is good for re-attaching book blocks to covers; filmoplast T tape comes in colors and can be used to mend a book on the outside. Both are self-adhesive and will not dry out or become brittle with age.
Missing pages can be tipped in. University of Illinois, Urbana Champaign has posted a nicely illustrated procedure for inserting loose page on the web.