diff --git a/ha-programming-scheme.org b/ha-programming-scheme.org
index ff6b663..1194f6e 100644
--- a/ha-programming-scheme.org
+++ b/ha-programming-scheme.org
@@ -25,49 +25,135 @@ A literate programming file configuring Emacs.
   ;;; Code:
   #+END_SRC
 * Introduction
-First, install MIT-Scheme, the Lisp dialect used throughout the book:
+First, install MIT-Scheme, the Lisp dialect used throughout the SICP book:
 =brew install mit-scheme= or =sudo apt install mit-scheme= .
 #+BEGIN_SRC sh
-brew install mit-scheme
+  brew install mit-scheme
 #+END_SRC
-Ah, hell, we should install them all!
+
+Or better yet, let’s use Guile:
 #+BEGIN_SRC sh
-brew install guile racket chicken
+  brew install guile
 #+END_SRC
-* Install Scheme
-The [[https://www.nongnu.org/geiser/][geiser project]] attempts to be the interface between Emacs and various Schemes.
+* Geiser (Scheme Interface)
+The [[https://www.nongnu.org/geiser/][geiser project]] attempts to be the interface between Emacs and various Schemes. Since I can’t decide which to use, I’ll install/configure them all.
 
 #+BEGIN_SRC emacs-lisp
   (use-package geiser
     :init
     (setq geiser-mit-binary "/usr/local/bin/scheme"
-          geiser-active-implementations '(mit))
-
+          geiser-racket-binary "/usr/local/bin/racket"
+          geiser-guile-binary "/usr/local/bin/guile"
+          geiser-active-implementations '(guile)
+          geiser-default-implementations '(guile))
     :config
-    (use-package geiser-mit)   ; Choose favorite
+    (use-package geiser-mit)
+    (use-package geiser-guile)
+    (use-package geiser-racket)
+
     (add-to-list 'org-babel-load-languages '(scheme . t)))
 #+END_SRC
-* Install SICP
+Do we need a Scheme work for Org Babel? According to [[https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-scheme.html][this document]], we just need to make sure we add the =:session= variable to start the REPL.
+** Try it Out
+:PROPERTIES:
+:header-args:scheme:    :session *scheming* :results value
+:END:
+
+This should work?
+#+name: hello-world
+#+header: :var message="Hello World! What?"
+#+begin_src scheme
+message
+#+end_src
+
+However, it doesn’t output the results /back into/ this buffer. What is the point of connecting it to =ob=?
+
+** Install SICP
+:PROPERTIES:
+:header-args:scheme: :session sicp :results value replace
+:END:
 Let’s get the book available as an Info page:
 #+BEGIN_SRC emacs-lisp
 (use-package sicp)
 #+END_SRC
-* Try it Out
-#+BEGIN_SRC scheme :results value
-  (define (fib n)
-    (if (< n 2) 1
-        (+ (fib (- n 1)) (fib (- n 2)))))
 
-  (fib 5)
+And does this work?
+#+BEGIN_SRC scheme
+  (inc 42)
 #+END_SRC
 
-* Technical Artifacts                                :noexport:
-Looks like we need this, at least, temporarily.
+Still having difficulty getting the Scheme REPL to output the results back into this document. Let’s try Racket...
 
+If we want to read the [[file:~/.emacs.d/straight/build/sicp/sicp.info][sicp.info]] file, looks like we need this, at least, temporarily:
 #+BEGIN_SRC emacs-lisp
 (add-to-list 'auto-mode-alist '("\\.info\\'" . Info-mode))
 #+END_SRC
+* Racket
+Actually, let’s do this with [[https://racket-lang.org/][Racket]]:
+#+BEGIN_SRC emacs-lisp
+  brew install racket
+#+END_SRC
 
+While Racket, as a Scheme, should work with Geiser (below), let’s also get [[https://racket-mode.com/][racket-mode]] working:
+#+BEGIN_SRC emacs-lisp
+  (use-package racket-mode
+    :config (setq racket-program "/usr/local/bin/racket"))
+#+END_SRC
+
+Can we get Racket working with Org?
+#+BEGIN_SRC emacs-lisp
+  (use-package ob-racket
+    :straight (:type git :protocol ssh :host github :repo "DEADB17/ob-racket")
+    :after org
+    :config
+    (add-to-list 'org-babel-load-languages '(racket . t)))
+#+END_SRC
+
+** Try It Out
+:PROPERTIES:
+:header-args:racket: :session racketeering :results value replace :lang racket
+:END:
+Working for values?
+#+BEGIN_SRC racket
+  (* 6 7)
+#+END_SRC
+
+#+RESULTS:
+: 42
+
+Working for output?
+#+BEGIN_SRC racket :results output replace
+  (define str-1 "hello")
+  (define str-2 "world")
+  (define all (string-join (list str-1 str-2) ", "))
+  (display (string-titlecase all))
+#+END_SRC
+
+#+RESULTS:
+: Hello, World
+
+The interface is horrendously slow, as the =:session= doesn’t seem to work, and starting up a Racket REPL takes a long time.
+
+** SICP and Racket
+:PROPERTIES:
+:header-args:racket: :session *rsicp* :results value replace :lang sicp
+:END:
+If using [[https://docs.racket-lang.org/sicp-manual/SICP_Language.html][Racket for SICP]], install the SICP language:
+#+BEGIN_SRC sh
+  raco pkg install --auto --update-deps sicp
+#+END_SRC
+
+We now can give it a =#lang sicp= (or better yet, use the =:lang= header) to define certain SICP-specify features:
+
+Let’s try this now:
+#+BEGIN_SRC racket
+(inc 42)
+#+END_SRC
+
+#+RESULTS:
+: 43
+
+* Technical Artifacts                                :noexport:
 Let's =provide= a name so we can =require= this file:
 
 #+BEGIN_SRC emacs-lisp :exports none