Chapter four is continued by chapter five
because it begins with "and." In this
chapter Jesus is seen in another one of His
glories as the Lamb who opens the book.

The seven-sealed book of this chaper contains
the secret of the chapters that will follow, and
is the key to the entire book of Revelation.

The book is a mortgage type contract of man's
sins and holds the terms by which man can be
redeemed from what Adam lost.