Guthrie’s introduction, which came in its fourth edition in 1990, discusses all issues of introductory questions. Guthrie argues for the apostolic authorship of Revelation and for a Domitianic date.
Although updated a few years ago, this edition seems to be less informed by newer studies of Revelation, e.g., concerning structure and genre, than expected (by me, at least).
Nevertheless, this is a readable and well-argued treatment. More here.