I read Melanie Phillips's "Londonistan" before reading Gove's book. Both books cover roughly the same ground, but I have to say that Phillips's tone can become rather exasperating, no matter how important the topic. Gove's book, on the other hand, is eminently controlled, level in tone, well researched and well written. For these, and for other reasons, "Celsius 7/7" is the more powerful of the two volumes.
And it is mercifully concise.
In his conclusion Gove makes an appeal that we would all do well to heed:
"More broadly, we also need to rediscover and reproclaim faith in our common values. We need an ideological effort to move away from moral relativism and towards moral clarity, as well as a commitment to build a truly incusive model of British citizenship in which divisive separatist identities are challenged and rejected."
Gove's is a clarion call to all of us to defend liberty and rationality. Unless we do this, we may well find ourselves heading rapidly towards a time of repression by religiously motivated totalitarian ideologues.