Every writer needs a chest of tools from experts in the trade. Here are some that I have benefited from or which are from authors whose work I respect.
The Christian Writer’s Manual of Style
by Robert Hudson
Christian Writers Market Guide
by Steve Laube
The Emotion Thesaurus
by Angela Ackerman & Becca Puglisi
The Dance of Character & Plot
by DiAnn Mills
Structuring Your Novel
by K.M. Weiland
Christian Publishing Show with Thomas Umstattd Jr.