2" non-yellowing library tape reinforcing spine; glue trace at bottom end of spine tells me this has been repaired. The book is tight with mild tilt (1/8"); moderate overall wear including a faint haze of ink dots front & back - transfered from another book during tight storage. Age tanning is mild and uniform: better than expected for this vintage. Lancer books of this vintage (and Berkley and Curtis Books) are notorious for having the glue fail - and then either the cover comes off or the pages fall out of the book. Careful repair with epoxy cures this, and I haven't seen a book so repaired lose pages (in the 25 years or more since I did such repairs for the SF lending library - in the early Eighties.)