I have just finished reading Client Attractors – How to Write Features, Benefits and Bullets That Speed Up Sales , by Sean D'Souza.
The book is pretty short, but still not only it is a pleasant read, it gave me much better insight on what should be on features, benefits and bullets and how to write them. I have read several other books in the area, but none were as clear as this.
There is also a premium version, which includes a 25 minute video. The video shows his technique for writing compelling sales pages, and also how to fit in the features, benefits and bullets. It does clarify and add to the book, so if the price difference is still minimum as it is now, you will want to get the Premium version.
Very much worth the time, recommended.