diff --git a/src/env.c b/src/env.c
index eb29e9b..82c9f39 100644
--- a/src/env.c
+++ b/src/env.c
@@ -132,9 +132,21 @@ struct Environment envForLambda(const Object* params, const Object* arguments, i
     const Object* param = params->list;
     const Object* argument = arguments;
     for (int i = 0; i < paramCount && param; i++) {
+        const char* paramName = param->string;
+        if (paramName[0] == '.' && paramName[1] == '.' && paramName[2] == '.' && paramName[3] != '\0') {
+            paramName = &paramName[3];
+            Object BuildListNamed(varargs);
+            while (argument) {
+                addToList(varargs, eval(argument, outer));
+                argument = argument->forward;
+            }
+            addToEnv(&env, paramName, varargs);
+            cleanObject(&varargs);
+            break;
+        }
+
         Object newEnvObj = eval(argument, outer);
 
-        const char* paramName = param->string;
         addToEnv(&env, paramName, newEnvObj);
 
         cleanObject(&newEnvObj);
diff --git a/src/examples/lib.pbl b/src/examples/lib.pbl
index 26e7316..efc943f 100644
--- a/src/examples/lib.pbl
+++ b/src/examples/lib.pbl
@@ -1,4 +1,5 @@
 #!/usr/bin/pl
+
 (def string (fn (a) (cat "" a)))
 
 (def switch (fn (val dict) (
@@ -27,9 +28,19 @@
 
 (def nl (ch 10))
 
-(def prnl (fn (_txt)
-  "Print with an appended newline." (
-  (prn (cat _txt nl))
+(def prnlambda (fn (text) (prn text)))
+
+(def prnl (fn (...text)
+  "Print the given elements with an appended newline." (
+  (for-each prnlambda text)
+  (prn nl)
+)))
+
+(def join (fn (separator text)
+  "With the given separator, join the given elements as a string. (join \"_\" (1 2 3)) => 1_2_3" (
+  (def initial (first text))
+  (def concat (fn (left right) (cat left separator right)))
+  (reduce (rest text) concat initial)
 )))
 
 (def _indexOf (fn (txt search) (
@@ -80,18 +91,22 @@
     (+ (fib (- a 1)) (fib (- a 2)))
 )))
 
-(def max (fn (a b) 
-  "Return the larger of the given values"
-  (if (> a b) a b)
+(def _max (fn (a b) (if (> a b) a b)))
+
+(def max (fn (...values)
+  "Return the largest of the given values"
+  (reduce values _max (first values))
 ))
 
-(def min (fn (a b) 
-  "Return the smaller of the given values"
-  (if (< a b) a b)
+(def _min (fn (a b) (if (< a b) a b)))
+
+(def min (fn (...values)
+  "Return the smallest of the given values"
+  (reduce values _min (first values))
 ))
 
 (def for-each (fn (action list)
-  "Apply the given action to each element in list." (
+  "Apply the given action to each element in list, and return an empty string." (
   (map action list)
   ""
 )))
@@ -149,14 +164,4 @@
 
 (def endsWith (fn (text pattern) (
   (matches text (cat "*" pattern))
-)))
-
-; Switch expression
-; Doesn't yet work with lambdas
-;(def switch (fn (val pair_list)
-;  (if (= 0 (len pair_list)) "no match"
-;    (if (= val (at 0 (at 0 pair_list))) (at 1 (at 0 pair_list)) (
-;      (switch val (rest pair_list))
-;    ))
-;  )
-;))
+)))
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index bd92b5e..371e741 100644
--- a/src/main.c
+++ b/src/main.c
@@ -244,7 +244,7 @@ int main(int argc, const char* argv[])
         readFile(SCRIPTDIR "/lib.pbl", &env);
     }
 
-    Object o = parseEval("(def prompt %%)", &env, nullTerminated("pebblisp::> "));
+    Object o = parseEval("(def prompt %%)", &env);
     cleanObject(&o);
     o = parseEval("(def preprocess (fn (text) (text)))", &env);
     cleanObject(&o);
diff --git a/src/object.c b/src/object.c
index 9981f6c..587d035 100644
--- a/src/object.c
+++ b/src/object.c
@@ -227,7 +227,7 @@ void stringStruct(struct string* s, const Object* obj)
  */
 int stringNObj(struct string* s, const Object* obj)
 {
-    inflate(s, 16); // In most cases this is enough to fit the appended string.
+    inflate(s, 32); // In most cases this is enough to fit the appended string.
     switch (obj->type) {
         case TYPE_NUMBER:
             appendf(s, "%ld", obj->number);
diff --git a/src/pebblisp.c b/src/pebblisp.c
index b128d20..48a6f9a 100644
--- a/src/pebblisp.c
+++ b/src/pebblisp.c
@@ -10,16 +10,14 @@
 
 #endif
 
-Object singleDef(Object* string, Object* value, struct Environment* env)
+Object singleDef(const char* name, Object* value, struct Environment* env)
 {
-    const char* name = string->string;
-
     Object finalValue = eval(value, env);
 
     addToEnv(env, name, finalValue);
     cleanObject(&finalValue);
 
-    return cloneObject(*string);
+    return nullTerminated(name);
 }
 
 Object listDef(Object* nameList, Object* valueList, struct Environment* env)
@@ -29,7 +27,17 @@ Object listDef(Object* nameList, Object* valueList, struct Environment* env)
         if (!value) {
             break;
         }
-        singleDef(POINTER, value, env);
+        const char* name = POINTER->string;
+        if (name[0] == '.' && name[1] == '.' && name[2] == '.' && name[3] != '\0') {
+            Object BuildListNamed(varargs);
+            while (value) {
+                addToList(varargs, *value);
+                value = value->forward;
+            }
+            addToEnv(env, &name[3], varargs);
+            break;
+        }
+        addToEnv(env, name, eval(value, env));
         value = value->forward;
     }
     return cloneObject(*nameList);
@@ -40,7 +48,7 @@ Object listDef(Object* nameList, Object* valueList, struct Environment* env)
  *
  * If `argForms` (symbol) and `argForms->forward` (value) are lists of the same
  * length, define each symbol element with the corresponding value element.
- * I.e. `(def (a b) (5 20))` would store `a` as `5` and `b` as `20`.
+ * I.e. `(def '(a b) (5 20))` would store `a` as `5` and `b` as `20`.
  *
  * @param argForms The symbol(s) and value(s) to define in the environment
  * @param env The environment to add the new definition to
@@ -49,7 +57,7 @@ Object listDef(Object* nameList, Object* valueList, struct Environment* env)
 Object def(Object* params, unused int length, struct Environment* env)
 {
     if (isStringy(params[0])) {
-        return singleDef(&params[0], &params[1], env);
+        return singleDef(params[0].string, &params[1], env);
     }
 
     if (length == 2 && isListy(params[0]) && isListy(params[1])) {
@@ -125,8 +133,8 @@ Object mapO(Object* params, int length, struct Environment* env)
     Object lambda = eval(&params[0], env);
     const Object* inputList = &params[1];
 
-    if (!isFuncy(lambda)) {
-        throw(BAD_TYPE, "First argument of (map) should be func-like.");
+    if (lambda.type != TYPE_LAMBDA) {
+        throw(BAD_TYPE, "First argument of (map) must be a lambda!"); // TODO: why no function?
     }
 
     Object BuildListNamed(outputList);
@@ -567,7 +575,9 @@ Object parseEval(const char* input, struct Environment* env)
         free(err.context);
         return o;
     }
+
     if (!tokens->text) {
+        free(tokens);
         return symFromSlice(" ", 1);
     }
 
diff --git a/src/pebblisp.h b/src/pebblisp.h
index 68a2b18..761efd2 100644
--- a/src/pebblisp.h
+++ b/src/pebblisp.h
@@ -23,11 +23,11 @@ typedef struct Result {
 
 Object eval(const Object* obj, struct Environment* env);
 
-Result readSeq(struct Slice* slices, va_list* injections);
+Result readSeq(struct Slice* slices);
 
 Result parseAtom(struct Slice* slice);
 
-Object parseEval(const char* input, struct Environment* env, ...);
+Object parseEval(const char* input, struct Environment* env);
 
 Object evalList(const Object* obj, struct Environment* env);
 
diff --git a/src/tokens.c b/src/tokens.c
index 9e514cc..f51060e 100644
--- a/src/tokens.c
+++ b/src/tokens.c
@@ -11,17 +11,21 @@
  */
 
 // Is the char a standalone token?
-static const char singleTokens[] = "()'?.";
+static const char singleTokens[] = "()'?";
 
-int isSingle(const char c)
+int isSingle(const char *c)
 {
     int i = 0;
     while (singleTokens[i] != '\0') {
-        if (singleTokens[i] == c) {
+        if (singleTokens[i] == c[0]) {
             return 1;
         }
         i++;
     }
+    // It's not a single if it's next to another '.'
+    if (c[0] == '.' && c[1] != '.' && c[-1] != '.') {
+        return 1;
+    }
     return 0;
 }
 
@@ -91,7 +95,7 @@ struct Slice* nf_tokenize(const char* input, struct Error* err)
         slices[slice].text = &input[i];
         slices[slice].lineNumber = lineNumber;
 
-        if (isSingle(input[i])) {
+        if (isSingle(&input[i])) {
             i++;
         } else if (input[i] == ';') {
             while (input[i] && input[i] != '\n') {
@@ -145,7 +149,7 @@ void processString(const char* input, struct Error* err, struct Slice* slices, i
 
 void collectSymbol(const char* input, int* i, int* length)
 {
-    while (!isWhitespace(input[++(*i)]) && !isSingle(input[(*i)]) && input[(*i)] != '"' && input[(*i)] != '\0') {
+    while (!isWhitespace(input[++(*i)]) && !isSingle(&input[(*i)]) && input[(*i)] != '"' && input[(*i)] != '\0') {
         (*length)++;
     }
 }
diff --git a/src/tokens.h b/src/tokens.h
index fba01c5..2fbfa08 100644
--- a/src/tokens.h
+++ b/src/tokens.h
@@ -3,7 +3,7 @@
 
 #include "pebblisp.h"
 
-int isSingle(char c);
+int isSingle(const char *c);
 
 int isDigit(char c);