Pretty good overall. I think the early parts are quite strong, when describing the history and mechanisms and position of gambling in society. These really hammer the point of how omnipresent and harmful an industry it is, and the sheer scale of it.
As a result, the last few chapters, which deal with the politics around the industry, are a bit of a let down, as the tone isn't as strong, the author seems almost wary of sticking the boot in, and attributes goodwill to politicians or industry actors who don't seem to deserve it. After the first part, I think a large degree of cynicism about any actions by the industry is deserved, and instead things are taken at their word, and their supposedly good intentions.
The chapter on the wealth of the CEOs, directors, etc. was very odd, almost hariographic, about people who made their money on the backs of vulnerable people, no matter how much they donate to foundations.
Overall I think it's a good entry into the subject, although could do with more bite, but it is a guardian/centrist approach so not too surprising.