Again. Just don't read books.
That depends on the publisher. Academic publications come in a few common forms. Peer-reviewed journals are just one. A number of publishing companies (including university publishers) publish highly technical books which are reviewed. Many of these are part of a series. For example, a book lying nearby me at the moment is
Fuzzy Probability and Statistics. It's published by Springer, a well-known academic publishing company. It's also volume 196 in the series "Studies in Fuzziness and Soft Computing." Also within grasping distance are two other books:
Theoretical Neuroscience: Computational and Mathematical Modeling of Neural Systems and
Investigations in Cognitive Grammar. The first is published by MIT press, and is a volume in the series "Computational Neuroscience." The second is published by Mouton de Gruyter (a company which produces a good portion of the academic work in linguistics).
Then there are books which are the published results of conference preceedings, academic committees, etc.
In other words, scholarship isn't strictly divided into journals vs. books. Specialists also rely on monographs, and edited books or series as these too are reviewed like academic journals.
Outhouse derided John Barrow, but he is just one of the editors and contributers in one of the books I cited. It was published by Cambridge University Press and is a volume in the series "Cambridge Astrobiology."
How about siting Science mag? That's reliable. Or perhaps the site of a university?
I cited a peer-reviewed journal in my last post, but Outhouse again maligned the author and the work. I could continue to cite such articles, like Mash's article on the improper use of "big numbers" and induction in arguments for the existence of extraterrestrial life. However, I imagine I would get the same reaction.
I started trying to make one point, but it has now become two. The second, unfortunately, is just a reaction to Outhouse's derisive comments about the authors and sources I use, which I believe is unjustified and so have asked for a basis for certain assertions made about what types of specialists are important when it comes to this question, the status of the field, etc.
The more important point is simply that 1) it is logically flawed to think that the fact that life exists on earth means it is at all likely to exist elsewhere. This argument has been made many times, including in peer-reviewed journals. More importently, it may be that the conditions for life, particularly intelligent life, are so rare that life elsewhere is virtually impossible.
If this is true, how does one weigh the probability of god vs. aliens?