For a writer, of course, it is important to become very familiar with aspects of writing (tenses, points of view, grammar rules, so on). I have taken classes in writing and have attended workshops, but my newest endeavor for honing my craft is reading the book "Writing Picture Books: A Hands-On Guide From Story Creation to Publication" by Ann Whitford Paul. This book was recommended to me by a few of my fellow critique group members. I have been reading it thoroughly in attempts to get as much out of it as possible. So far, this book has been a review for me, as well as an introduction to some concepts that are new to me. I especially like how the author gives book examples to illustrate points she is making, and I really like the hands on activities she includes at the conclusion of each chapter. I've already come up with a few book ideas while reading her book!
If you are hoping to write a Picture book or a Picture storybook, I too would suggest picking up this book.
Writing Picture Books: A Hands-On Guide From Story Creation to Publication
By Ann Whitford Paul