This is the world's most useful tefillin book.
It includes:
• what tefillin are
• how they are made
• why we wear them
• instructions how to wear them
• illustrations
Strangely enough, perhaps because the book is so small and inexpensive, it’s rarely given as a bar mitzvah gift. Most tefillin-wearers don’t discover it until their 20s and they wonder, “Why didn’t anyone teach me this stuff when I was 13????”