As for book recommendations on magic I would suggest the following:
"Before You Cast a Spell" by Carl McColman
"Spells And How They Work" by Janet and Stewart Farrar
"The Veil's Edge" by Willow Polson
"Modern Magick" by Donald Michael Kraig
It is certainly possible, and even preferable, to create your own spells. Some of the following sites are very Wiccan or Pagan in viewpoint so if that doesn't work for you we can talk about how you could change the spell to fit your spiritual viewpoint.