I have been doing a bit of night fishing for Trout this fall and it got my interest in learning a bit more. So I came across a recommendation for an old book called "Taking Larger Trout" by Lawrence R. Koller. This book has a whole chapter dedicated to fly fishing for trout at night. Well I just received my copy and have to say it is a very fine book. It is well written and contains a lot of timeless information. It was written or published in 1950 and reprinted in 1952. Seems that Ray Bergmans book 'Trout' from that period garners most of the attention but this is also a very worthy book to consider if you enjoy collecting or reading old fishing books. Highly recommend.
