To Fix? Or to Toss?!

My favorite cookbook is my Fanny Farmer cookbook, 11th edition. (Each edition is a little different.)

I bought my first copy, a paperback edition, when I was a university student. Once, to lighten my load when I was moving, I gave that copy to a friend, thinking I'd be able to buy another...

That's when I discovered that each edition was a little different!

I eventually found the book I wanted on Ebay, and even ordered a second, so that I'd have a backup if the first one disintegrated... which it finally has!

Now my question is: to try to salvage this one by having it coil bound? Or to toss it and rely solely on my other copy - which is still in reasonably good shape?!

I'll have to think about that for a while!