There are 5 books in the Sid Halley series. The newest book is Dick Francis's Refusal which came out in 2013.

1
Odds Against

Book cover of Odds Against
Former hotshot jockey Sid Halley landed a position with a detective agency, only to catch a bullet from some penny-ante thug. Now, he has to go up against a field of thoroughbred criminals--and the odds are against him that he'll even survive.
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3
Come to Grief

Book cover of Come to Grief

This is Francis writing at his very best' Evening Standard

Sid Halley, the ex-champion jockey turned investigator who appears in Odds Against and Whip Hand, is back. In Come to Grief he faces new dangers, new deeply demanding decisions.

Sid has uncovered an obnoxious crime committed by a friend whom…

4
Under Orders

Book cover of Under Orders
"Sadly, death at the races is not uncommon. However, three in one afternoon was sufficiently unusual to raise more than an eyebrow."

It's the third death that really troubles former champion jump-jockey Sid Halley. He knows the perils of racing all too well - but in his day, jockeys didn't…

5
Dick Francis's Refusal

Book cover of Dick Francis's Refusal

Refusal is the new Dick Francis novel from bestseller, Felix Francis.

When Sir Richard Stewart, chair of the horse racing authority, demands ex-investigator Sid Halley examines some suspicious races, he is given a firm no. Sid retired six years ago - and nothing will make him go back.

But he's…