10:2 little book. “Little book” is from the Greek bibliaridion, which is the diminutive of biblion, as used for “book” in Revelation 5:1-9. The latter represented the title deed to the whole earth. All its seals will have been broken by this time, so that the book is fully “open,” with the writing signifying ownership fully displayed. Accordingly, the “mighty angel” or “mighty messenger” will descend from heaven and stand astride both land and sea, proclaiming His right thereto. As “joint heirs with Christ” (Romans 8:17; Revelation 2:26-27; 3:21), God will graciously allot each of His saints a portion of that inheritance, and this seems to be represented by the “little book”—that is, a title deed to an appropriate portion of that inheritance. Each believer, as represented by John, will receive such a portion as John receives.