For the set that comes back early: lifting at the base, the sidewalls or the free edge, bubbles, chips, a cloudy top, yellowing — what you see, where it came from and what you change next time.

The seven shapes, from square to stiletto, each drawn from above and in profile with its guide lines, the filing angle and the mistake that shape makes — so all ten fingers come out the same.

18 illustrated pages for the hand you almost turned away: bitten nails and the four-appointment comeback, the pincer curve, building a curve on a flat nail, and what to do with another tech's set. Plus the three signs that mean you don't work on it at all.

19 illustrated pages: how a toenail is built, straight-across cutting, callus vs corn and what you never cut, the three stages of an ingrown nail, the diabetic foot and the footbath protocol. Plus the table: work · careful · refer.