Why Your Paperback Is Worth Saving

Most paperbacks are built to a price, not to a century. A modern paperback is usually perfect bound: single leaves are gathered, trimmed flush at the spine and held there with a flexible hot-melt glue, with the cover wrapped around the lot. Older or better-made paperbacks are sewn in signatures — folded groups of pages stitched through the centre fold, then glued into a cover. Both designs fail in the same predictable places: the hinge, where the cover meets the text block; the spine, which cracks as the adhesive ages; and the corners, which fray as the book is pulled from the shelf.

The good news is that nearly all of this damage is repairable on a kitchen table with a modest kit and a little patience. A paperback you have read twenty times, with your own notes in the margins, is worth half an hour of careful work.

The Small Kit That Does Most of the Work

• Acid-free PVA — a conservation-grade adhesive that stays flexible and dries clear. Ordinary woodworking PVA sets hard and brittle, and will crack the spine again within a year.
• Wheat starch paste — reversible with water, ideal for old or delicate paper and for tissue repairs.
• A bone folder — for creasing, burnishing and pressing repairs flat without marking the paper.
• Japanese tissue (kozo, around 12–17gsm) and a little linen mull or fine cotton tape for spine work.
• Waxed or greaseproof paper, padded spring clips or clothes pegs, two flat boards and a couple of weights — a bag of rice or coins works perfectly.
• A scalpel with a fresh blade, a small brush, a cutting mat and kitchen roll for cleaning up.

Buy the adhesive from a conservation or bookbinding supplier and decant only what you need. Never use self-adhesive book tape, clear film or contact adhesive on a book you care about: they shrink, yellow and tear fibres when they eventually fail.

Tightening Loose Signatures

First, work out what you are dealing with. Open the book to the middle of a section and look into the fold: if you can see thread, it is sewn. If the pages are single leaves glued edge-on, it is perfect bound. A loose signature in a sewn book is usually slack stitching, not a broken thread, and can be coaxed tight again.

• Lay the book flat and open it gently to the loose section.
• Slide a strip of waxed paper behind the section to protect the pages underneath.
• With a fine brush, run a thin bead of PVA along the inner hinge of that section, working from head to tail. Less is more — a bead the width of a pin is plenty.
• Close the book, check the text block is square, and press it between the boards under weight for at least twenty-four hours.

If a perfect-bound book has shed a block of pages all at once, treat it much the same way: brush a thin line of PVA along the exposed edge of the block, ease it back into the spine, close the book, and press it flat overnight. Don't force the book open while the glue cures.

Repairing the Spine with Acid-Free Glue

When the spine covering has come away, resist the urge to glue it straight back down. Old adhesive must go first, or your repair will simply lift off with it.

• Slip a scalpel blade under the spine panel and cut gently along both hinges to free it.
• Scrape the old glue from the spine of the text block with the blade held almost flat, brushing away crumbs as you go.
• Apply a thin, even coat of PVA to the spine of the block, then lay a strip of linen mull or Japanese tissue over it, pressing it down with the bone folder.
• Glue the outer spine panel and reposition it, checking that the book still opens and closes squarely.
• Wrap the whole spine in waxed paper, clamp it lightly between boards and weight it for a day.

Keep the spine flexible. A paperback needs to hinge; a rigid, over-glued spine will crack at the shoulders the first time it is read.

Reinforcing Covers and Hinges

A hinge that has torn part-way through is best reinforced rather than taped. Cut a strip of Japanese tissue 15–20mm wide and a little shorter than the height of the cover. Paste it with wheat starch paste and lay it across the damaged hinge, working it down with the bone folder and smoothing out any wrinkles. If the cover is already detached, apply the strip to the inside of the hinge, where it will be invisible.

Tissue can be toned with a dab of watercolour or acrylic to blend with a printed cover. For frayed corners, build up two or three layers of small tissue patches rather than one thick one, letting each dry before the next. The repair will be stronger and far less obvious.

Press, Dry and Handle Gently Afterwards

Every repair needs to dry flat and under weight. Lay waxed paper on both sides of the repaired area, sandwich the book between boards, and leave it somewhere cool and dry for twenty-four to forty-eight hours — never on a radiator or in direct sun.

Once repaired, store paperbacks upright on the shelf rather than leaning in a stack, and ease them open from the middle rather than cracking them at the front. A paperback treated kindly after a good repair will comfortably see out another generation of readers.