If I wasn't aware of the history, I would think that the final third of this book was embellished -- street battles between members of the same side during a civil war? I've seen it argued that the Soviet Union's assistance hurt the Left in Spain more than it helped, and after reading this, it's certainly a perspective I have to take seriously.
Overall, this is a fascinating work, both from its perspective on soldiering in an unfamiliar land, as well as Orwell's analysis of the political situation (which, until the end, he keeps in separate chapters, which is a nice touch if one wants to focus on one or the other). What is obvious to us over sixty years later (that the USSR's purpose in Spain was to advance its own foreign policy, rather than necessarily to help the Republicans) was tragically not so during the war, much to the detriment of the dead.
The second work in this book, Down and Out in Paris and London, shows Orwell's socialism in if not quite an inchoate form, at least not at its final stage of development. The descriptions of the lives of poverty led by waitstaff, tramps, and residents of cheap hotels are real, but the feeling is similar to Pulp's "Common People":
cos when you're laid in bed at night,In short, that Orwell is living like this to have a taste of the life, not because he has no alternatives. This is illustrated when, fed up with working fifteen hour days underground as a "plongeur" (a dishwasher/errand boy), he writes a friend in London, who is able to get him a job quickly, so Orwell is able to leave his (miserable, but not untypical) fifteen hour workday.
watching roaches climb the wall,
if you call your Dad he could stop it all
The second portion of Down and Out in Paris and London is along the same lines -- when Orwell arrives in London, and is informed that his position will not be ready for a month, he decides to spend the time slumming, sleeping in workhouses and public dormitories. Here, the conditions are truly appalling, and Orwell does meet some fascinating characters. However, he does occasionally slip into lecturing, but that can be forgiven in such a young (at the time) author.
Clearly, Down and Out in Paris in London is no longer quite relevant -- not because no one in major Western cities lives or works in poor conditions, but because the conditions described here no longer exist. It is a worthwhile document of a bygone time, and it's worthwhile to see a young Orwell's ideas taking shape. Homage to Catalonia is, in my opinion, the more significant and interesting work here.