diff --git a/roles/calibre/tasks/debs.yml b/roles/calibre/tasks/debs.yml
index b00a69d7f..954d0c081 100644
--- a/roles/calibre/tasks/debs.yml
+++ b/roles/calibre/tasks/debs.yml
@@ -19,8 +19,8 @@
 # HOWEVER: it's strongly suggested you wait for apt (blessed by your OS!)
 
 - name: Upgrade to Calibre testing .deb's - target Raspbian (rpi)
-  #command: scripts/calibre-install-latest-rpi.sh  #fails with Calibre 3.24 & 3.25, and beyond?
-  command: scripts/calibre-install-latest.sh       #Debian approach works for now (3.24 & 3.25)
+  command: scripts/calibre-install-latest-rpi.sh  # Failed w/ Calibre 3.24 & 3.25 in early/mid June 2018 -- better luck since!
+  #command: scripts/calibre-install-latest.sh     # Debian approach installed Calibre 3.24 & 3.25 but prevented boot in RPi Zero W
   when: is_rpi and internet_available
 
 - name: Upgrade to Calibre testing .deb's - target Ubuntu 16.04 (not rpi and not ubuntu_18)
diff --git a/scripts/calibre-install-latest-rpi.sh b/scripts/calibre-install-latest-rpi.sh
index ada054c88..886dc1a29 100755
--- a/scripts/calibre-install-latest-rpi.sh
+++ b/scripts/calibre-install-latest-rpi.sh
@@ -3,18 +3,21 @@
 # Thanks to Jerry Vonau (https://github.com/jvonau) who made this critical
 # breakthrough possible!
 #
-# Worked up to Calibre 3.23 from May 2018.
-# Calibre 3.24 and 3.25 fail to "apt install" in June 2018:
+# This script worked up to late May 2018 with Calibre 3.23 -- and again began
+# working in late June 2018 with Calibre 3.26 -- whereas Calibre 3.24 and 3.25
+# failed to "apt install" below, back in early/mid-June 2018:
 #
 #   The following packages have unmet dependencies:
 #    calibre : Depends: python-pyqt5 (>= 5.10.1+dfsg-2) but 5.10.1+dfsg-1+rpi1 is to be installed
 #   E: Unable to correct problems, you have held broken packages.
 #
-# Debian approach (calibre-install-latest.sh) is the workaround for now:
+# Debian approach (calibre-install-latest.sh) was the interim workaround in
+# mid-June 2018, which did install Calibre 3.24 & 3.25 at that time, however
+# this prevented resulting IIAB microSD's from booting in RPi Zero W:
 #
-#   https://github.com/iiab/iiab/pull/833
+#   https://github.com/iiab/iiab/pull/834
 # 
-# Calibre 3.25 is the latest available from testing as of 2018-06-10:
+# Calibre 3.26.x is the latest available from testing as of 2018-06-28:
 #
 #   http://raspbian.raspberrypi.org/raspbian/pool/main/c/calibre/
 #   http://archive.raspbian.org/raspbian/pool/main/c/calibre/
diff --git a/scripts/calibre-install-latest.sh b/scripts/calibre-install-latest.sh
index 7de7a163f..a48f2e451 100755
--- a/scripts/calibre-install-latest.sh
+++ b/scripts/calibre-install-latest.sh
@@ -3,7 +3,7 @@
 # Thanks to Jerry Vonau (https://github.com/jvonau) who made this critical
 # breakthrough possible!
 #
-# Calibre 3.25 is the latest available from testing as of 2018-06-10:
+# Calibre 3.26.x is the latest available from testing as of 2018-06-28:
 #
 #   https://packages.debian.org/search?keywords=calibre
 #   http://deb.debian.org/debian/pool/main/c/calibre/