Today I added 3 books to the horse section.

Some difficult-to-find items that the owner said had quite a bit of value to the horse betters.

Secrets of Professional Turf Betting, by Robert L. Bacon.  1961

Betting at the Racetrack, by William T. Ziemba and Donald B. Hausch. 1985

and

Beat the Racetrack, by William T. Ziemba and Donald B. Hausch.  1984.

Find 'm here.