diff --git a/pack.go b/pack.go
index ba63e77..b98af41 100644
--- a/pack.go
+++ b/pack.go
@@ -1,6 +1,9 @@
 package draft // import "git.fromouter.space/mcg/draft"
 
-import "math/rand"
+import (
+	"math/rand"
+	"strings"
+)
 
 // Pack is a collection of cards from a booster pack
 type Pack []Card
@@ -66,3 +69,12 @@ func MakePackWithSchema(schema PackSchema) Pack {
 	}
 	return pack
 }
+
+// String encodes a pack to a list of space-separated IDs
+func (p Pack) String() (str string) {
+	for _, card := range p {
+		str += " " + card.ID
+	}
+	str = strings.TrimSpace(str)
+	return
+}
diff --git a/set_test.go b/set_test.go
index 69cbabb..3a43c52 100644
--- a/set_test.go
+++ b/set_test.go
@@ -1,21 +1,23 @@
-package draft
+package draft_test
 
 import (
 	"fmt"
 	"math/rand"
 	"testing"
+
+	"git.fromouter.space/mcg/draft"
 )
 
 // TestSetRepeatable makes sure that a set can generate more cards than it contains
 func TestSetRepeatable(t *testing.T) {
 	const PACKSIZE = 5
-	s := &GenericSet{
-		Cards:    []Card{{ID: "a"}, {ID: "b"}, {ID: "c"}},
+	s := &draft.GenericSet{
+		Cards:    []draft.Card{{ID: "a"}, {ID: "b"}, {ID: "c"}},
 		PackSize: PACKSIZE,
 	}
 
 	// Create a pack
-	pack := MakePack(s)
+	pack := draft.MakePack(s)
 
 	if len(pack) < PACKSIZE {
 		t.Errorf("Pack expected to contain %d cards, contains %d", PACKSIZE, len(pack))
@@ -34,17 +36,17 @@ func TestSetRepeatable(t *testing.T) {
 
 // TestAlternateProviders tests alternate providers
 func TestAlternateProviders(t *testing.T) {
-	customProvider := func(n int) []Card {
-		out := make([]Card, n)
+	customProvider := func(n int) []draft.Card {
+		out := make([]draft.Card, n)
 		for n := range out {
-			out[n] = Card{ID: "x"}
+			out[n] = draft.Card{ID: "x"}
 		}
 		return out
 	}
-	s := &GenericSet{
-		Cards:    []Card{{ID: "a"}, {ID: "b"}, {ID: "c"}},
+	s := &draft.GenericSet{
+		Cards:    []draft.Card{{ID: "a"}, {ID: "b"}, {ID: "c"}},
 		PackSize: 1,
-		Alternates: []AlternateProvider{
+		Alternates: []draft.AlternateProvider{
 			{
 				Probability: 0.3,
 				Provider:    customProvider,
@@ -56,7 +58,7 @@ func TestAlternateProviders(t *testing.T) {
 
 	nonalternates, alternates := 0, 0
 	for i := 0; i < 500000; i++ {
-		pack := MakePack(s)
+		pack := draft.MakePack(s)
 		if pack[0].ID == "x" {
 			alternates++
 		} else {
@@ -76,16 +78,16 @@ func TestAlternateProviders(t *testing.T) {
 // TestCubeOverflow makes sure cubes stop providing cards as they are exhausted instead of going out of bound
 func TestCubeOverflow(t *testing.T) {
 	const PACKSIZE = 5
-	c := &GenericCube{
-		Cards: []Card{
+	c := &draft.GenericCube{
+		Cards: []draft.Card{
 			{ID: "a"}, {ID: "b"}, {ID: "c"}, {ID: "d"}, {ID: "e"},
 			{ID: "f"}, {ID: "g"}, {ID: "h"}, {ID: "i"},
 		},
 		PackSize: PACKSIZE,
 	}
 
-	pack1 := MakePack(c)
-	pack2 := MakePack(c)
+	pack1 := draft.MakePack(c)
+	pack2 := draft.MakePack(c)
 
 	// Pack 2 can only contain 4 cards, as there are not enough cards to fill it
 	if len(pack2) >= PACKSIZE {
@@ -100,11 +102,21 @@ func TestCubeOverflow(t *testing.T) {
 	}
 }
 
+// TestPackString makes sure packs are serialized correctly
+func TestPackString(t *testing.T) {
+	p := draft.Pack{{ID: "a"}, {ID: "b"}, {ID: "c"}}
+	expected := "a b c"
+
+	if p.String() != expected {
+		t.Errorf("Expected \"%s\" but got \"%s\"", expected, p)
+	}
+}
+
 // ExampleGenericSet is an example usage of the Set APIs to make packs
 func ExampleGenericSet() {
 	// Create a set with some items
-	s := &GenericSet{
-		Cards: []Card{
+	s := &draft.GenericSet{
+		Cards: []draft.Card{
 			{ID: "a"},
 			{ID: "b"},
 			{ID: "c"},
@@ -113,7 +125,7 @@ func ExampleGenericSet() {
 	}
 
 	// Create a pack
-	pack := MakePack(s)
+	pack := draft.MakePack(s)
 
 	// Print cards in pack
 	for i, card := range pack {
@@ -122,7 +134,7 @@ func ExampleGenericSet() {
 }
 
 // https://gist.github.com/alioygur/16c66b4249cb42715091fe010eec7e33
-func sliceUniq(s []Card) []Card {
+func sliceUniq(s []draft.Card) []draft.Card {
 	for i := 0; i < len(s); i++ {
 		for i2 := i + 1; i2 < len(s); i2++ {
 			if s[i].ID == s[i2].ID {