i open with 1.Nf3 exclusively, and as Gatorpawn007 said, many GM's use it. WC Carlson used it a couple of times against Anand in their first WC match and gained good positions with it, though he misplayed later and had to settle with draws.
depending on level of play; i think "Chess Opening Essentials 4" is an excellent 4 part series, with the 4th volume concentrating on 1.Nf3 and 1.c4, which i particulary liked, because often 1.Nf3 transposes to English variations. this book is an easy read and provides many example games, though none are annotated.
just to let you know: volume one is on 1.e4, volume two is about 1.d4, and the third is about Indian openings......all are easy reads and a very fluid read.
Does anyone have any thoughts or suggestions regarding opening with 1.Nf3 as opposed to 1.d4 or 1.e4, as well as books such as the following (directed to opening with 1.Nf3)?
Wojo’s Weapons: Winning with White (3 or 4 volumes)