Hieroglyphs without Mystery by Karl-Theodor Zauzich.
Of the four basic texts I have on learning hieroglyphs, this book is perhaps the simplest of the four to use. It has a basic vocabulary and basic grammar building. The exercises and the flow of the book didn't appeal to me as much as Collier and Manley's, but that might be due to the fact it is translated from German (I have studied German, but not well enough, alas, to attempt to read hieroglyphs through German if I can avoid it!). This book also incorporates a transliterated system to aid learning.
I appreciated the honest in the first sentence: 'This is this first point to remember: Egyptian hieroglyphic writing was mastered in its own time by many people, most of whom were no more geniuses than present-day people (or Egyptologists) are.'
Sometimes the study of something such as hieroglyphs can be unnecessarily intimidating; this book reduces anxiety by reducing the language to easily understood components of vocabulary and grammar.
This book would make a good volume for self-study, for church or study groups to use for informal learning, and for one-semester courses for those interested in ancient history or ancient languages.