diff --git a/TODO-pages.md b/TODO-pages.md
index 83de0fff..ae12c9fe 100644
--- a/TODO-pages.md
+++ b/TODO-pages.md
@@ -2,7 +2,7 @@
 
 This document describes a project known as the _pages epic_. The goal of the pages epic is to enable
 qpdf to properly preserve all functionality associated with a page as pages are copied from one PDF
-to another (or back to the same PDF). A secondary goal is to add more flexiblity to the ways in
+to another (or back to the same PDF). A secondary goal is to add more flexibility to the ways in
 which documents can be split and combined (flexible assembly).
 
 This is a work in progress. As implementation proceeds, details will become more solid. Comments are
@@ -195,7 +195,7 @@ Other notes:
 
 This section discusses modifications to the command-line syntax to make it easier to add flexibility
 going forward without breaking backward compatibility. In qpdf 11.9.0, we added non-positional
-options to `--pages`, `--overlay`, `--underlay` and modifid configuration to make it easier to add
+options to `--pages`, `--overlay`, `--underlay` and modified configuration to make it easier to add
 new options.
 
 In several cases, we allow specification of transformations or placements. In this context:
@@ -204,7 +204,7 @@ In several cases, we allow specification of transformations or placements. In th
   * An _absolute dimension_ is `{n}` (in points), `{n}in` (inches), `{n}cm` (centimeters),
   * A _relative dimension_ is expressed in terms of the corresponding dimension of one of a page's
     boxes. Which dimension is determined by context.
-    * `{n}{M|C|B|T|A}` is `{n}` times the corresopnding dimension of the media, crop, bleed, trim,
+    * `{n}{M|C|B|T|A}` is `{n}` times the corresponding dimension of the media, crop, bleed, trim,
       or art box. Example: `0.5M` would be half the width or height of the media box.
     * `{n}+{M|C|B|T|A}` is `{n}` plus the corresponding dimension. Example: `-0.5in+T` is half an
       inch (36 points) less than the width or height of the trim box.
@@ -453,7 +453,7 @@ Last checked: 2024-01-18
 gh search issues label:pages --repo qpdf/qpdf --limit 200 --state=open
 ```
 
-* Allow an existing `QPDF` to be an input to a merge or underly/overlay operation when using the
+* Allow an existing `QPDF` to be an input to a merge or underlay/overlay operation when using the
   `QPDFAssembler` C++ API
   * Issues: none
 * Fixes to copying annotations
diff --git a/cSpell.json b/cSpell.json
index 66c626c4..eda54cda 100644
--- a/cSpell.json
+++ b/cSpell.json
@@ -113,6 +113,7 @@
     "decrypter",
     "deduplicating",
     "defaultvalue",
+    "denable",
     "deps",
     "deserialization",
     "destdir",
@@ -192,6 +193,7 @@
     "fvisibility",
     "gajic",
     "gajić",
+    "gcovr",
     "gcurl",
     "genname",
     "genok",
@@ -436,6 +438,7 @@
     "pageobj",
     "pagepos",
     "pageposfrom",
+    "pagespec",
     "parms",
     "parseable",
     "parsecontent",
@@ -479,10 +482,13 @@
     "programfiles",
     "programlisting",
     "proxied",
+    "psbook",
+    "pstops",
     "pushbuttons",
     "pushedinheritedpageresources",
     "putu",
     "pval",
+    "pybind",
     "pytest",
     "qarray",
     "qdata",
@@ -521,6 +527,7 @@
     "qpdfpagedocumenthelper",
     "qpdfpagelabeldocumenthelper",
     "qpdfpageobjecthelper",
+    "qpdfpagestree",
     "qpdfparser",
     "qpdf's",
     "qpdfs",
@@ -593,6 +600,7 @@
     "soversion",
     "sparseoharray",
     "sphlib",
+    "splittingmerging",
     "sprintf",
     "squote",
     "srandom",
diff --git a/spell-check b/spell-check
index 7fb4db81..e0e95118 100755
--- a/spell-check
+++ b/spell-check
@@ -14,4 +14,5 @@
 cd $(dirname $0)
 cspell '**/*.hh' 'include/qpdf/*.h' '**/*.cc' \
        'manual/*.rst' 'manual/*.in' 'manual/_ext/*.py' \
-       '**/CMakeLists.txt' ChangeLog 'README*' TODO
+       '**/CMakeLists.txt' 'README*.md' 'TODO*.md' \
+       'README*.txt' ChangeLog