I'm mostly finished with Terence O'Brien's "Chasing After Danger" and I give it the highest recommendation. It is now one of my favourite accounts of WW2 flying. O'Brien has the uncanny ability to paint pictures in language...and not just one style. He covers the broad, sweeping landscape while, at the same time, able to zoom in on tiny details, while making the whole thing seem entirely effortless and uncontrived. My favourite piece so far is his quoting of the start to Banjo Patterson's poem "The Man from Snowy River" and comparing it to the situation at St.Eval where he was posted on his first tour in March 1941. The only downside is the lack of any photos...but the storytelling more than makes up for it.
Get it. Read it. You won't regret it!