What you shouldn’t do under any circumstances, although probably others have already beaten you to it. Leave the tears alone! A mylar jacket protector will usually hold the tears in place, and no matter what you hear, unless a jacket is a total train wreck, a book isn’t going to gain value from a tape repair. We were once in the bookstore of a putative first edition dealer. While browsing we were perplexed to hear a constant “hisp – hisp – hisp” sound coming from behind the counter. Thinking that snakes were attacking the proprietor, we rushed over to rescue him. To our disappointment, we found that the sound was emanating from the dealer himself, who was engaged in repairing with tape, every tear in every jacket that he owned. We broke his fingers and stole his tape dispenser. We wish the snakes had gotten him. One is cautioned not to place one’s faith in tapes that are described as "archival." One generation's "archival" is often the next generation's nightmare. This copy of The Power House by Benjamin Apple, featured in our Catalog 88, had an internal tape repair along the crown of the dustjacket when we bought it.