Oswald Chambers was a man perfectly at peace with his Lord and Saviour. He didn't arrive there without pain, but he was probably one of the most wonderful examples ever of a totally surrendered disciple, with a truly full and childlike faith. He was known as a delightful, joyful man, full of generosity of spirit and humour, yet also extremely deep and relentless in his commitment to God. Oswald's words are often blunt to the point of being fierce, but he would likely tell you (and has said) that the Lord's own words are so piercing as to divide body and soul asunder. Oswald Chambers' faith was a no-nonsense faith: trust and obey, and refuse to worry.
I love this devotional, and I dearly love this delightful, fierce, sweet brother. The Lord took him early, but for a purpose -- transcriptions of his talks were published (thanks to his wife Biddy's tireless determination) to fill a gap left by his quite sudden and premature death. Biddy's shorthand skills were phenomenal; she apparently compiled the devotionals from the vast bank of material she had taken down in shorthand at Oswald's lectures over the years. The Lord has used these devotionals mightily for almost a century now.
One thing, however, which I just discovered about this particular edition -- it seems to be very slightly truncated. For example, the December 7th devotional leaves out a phrase that appears in the online versions of the same classic devotional: "The old Puritans used to pray for 'the gift of tears.'" Now that I've noticed this, I'm curious to know what else has been left out, and whether other editions also vary slightly. If this is an abridged version, this should have been indicated somewhere.
THAT SAID, there's nothing "missing" in this edition, in the larger sense. The Lord seems to delight to use this devotional as a tool in training up disciples. I very, very highly recommend it.