This is a physics example and I think the first edition was in 1995, but if I remember rightly there are some important results derived in Weinberg's textbook The Quantum Theory of Fields: Volume I. Although the book is marketed as being for students, it is almost a research monograph for experts and would actually be a rather difficult and confusing read for a beginner student of field theory (it is around 600 pages in length).
One of the most interesting parts of the book is on soft photons and infrared divergences. If I remember rightly he shows that that a generic infrared finite $S$-matrix does not exist for gauge theories, even if the relevant inclusive cross sections are all finite (this may also be proved in his 1965 paper).
He also shows that there is a soft photon theorem when the matter fields are charged particles, although again this might also be in the 1965 paper. This theorem is shown in the book to not receive any loop corrections and so is exact at tree level.
Edit: Since someone has argued that the book of Weinberg is not a research monograph with new results, I will mention instead that Jacques Tits has several books which mightwould qualify (although I don't think any were written within the past 10 years).