There are a number of decent books.

"Become an Effective Software Engineering Manager", "The Manager's Path", "Becoming a Technical Leader", "An Elegant Puzzle", "Resilient Management".

But your best bet is either finding an experienced manager who's willing to coach you, or working with a management coach.

(There's a number of folks blogging as well. Gergely Orosz, Laura Hogan, Camille Fournier,...)