Persist ordered book writing and restore Legacy book pages

README.md

@@ -73,7 +73,14 @@ Inputs are consumed only when the result is taken.
 
 The completed book receives its Age identity when assembled. With only a Link
 Panel, it describes a randomly generated Age. Its writing is stored on the
-book; Milestone 5 will interpret additional symbols during Age generation.
+book; the Descriptive Book screen's turned pages show ordered symbols and
+unresolved IDs. Until Milestone 5, symbols do not affect generation and written
+books use the same random Age fallback. The Descriptive Book screen follows
+Legacy's book spread: the title and Age details are on the left, the destination
+preview is on the right, and clicks in the bottom corners turn pages. Ordered
+symbol pages appear before the final blank spread; their pictograms await
+Milestone 5. Link-panel-only books show their details in the enchantment-table
+font.
 
 ## Linking Book
 
@@ -84,6 +91,8 @@ its preview panel is clicked. The destination is stored on the item and
 survives inventory and world saves. Travel only succeeds if the target
 dimension is loaded and a non-fluid, passable landing position can be found
 nearby.
+The Linking Book uses the same Legacy page layout and bottom-corner page turns
+as the Descriptive Book, but without the Descriptive Book's gold cover edges.
 
 Successful book travel plays Mystcraft Legacy's original linking sound at both
 the departure and arrival locations.