Shalom Aleichem: Learn to Read the Hebrew Prayerbook (English and Hebrew Edition)

This is an excellent book to learn to read the siddur. Grammar and vocabulary are not taught; rather, a method of "sounding out" way of reading is taught. You learn a little bit each page and then build on that. Once this slim volume is mastered you will be able to read any prayer from the siddur. Understanding is a whole new issue but this book is amazing and quick. The biggest problem is the publisher has gone out of business and only limited copies are available.