For a dispensational treatment, Anthony Garland has written a thorough, helpful, and accessible work on the Book of Revelation that you may not have heard of. 

You can find a free version online at www.spiritandtruth.org. Logos has it for sale in electronic form, and Amazon carries the printed and Kindle versions as well (link here). 

Garland’s work is recommended along with Thomas, MacArthur, and Walvoord.