What makes a good Irish sports book?

Already they fall through letterboxes and pile up on desks; see them fill out brown paper bags and bulk out briefcases; here they are in the million hordes (thanks, David Bowie).

I refer to the eruption of sports books which is now beginning around the country.

Interesting sidebar: a publisher once told me that 80% of the books sold in a year are sold the month running into Christmas, and that 80% of those are bought by women.