Cheapest priced copy (The List): $3.49 at Card Kingdom, near mint, their price list as of .
Spellbook 
Artifact — Book · Uncommon · The List · #10E-343
You have no maximum hand size.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
10 printings · $3.49 to $129.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 343 | Uncommon | $3.99 | $10.99 |
| Seventh Edition | 318 | Uncommon | $3.99 | — |
| Seventh Edition | 318★ | Uncommon | — | $129.99Out of stock |
| Eighth Edition | 314 | Uncommon | $3.99 | — |
| Eighth Edition | 314★ | Uncommon | — | $11.99 |
| Ninth Edition | 309 | Uncommon | $3.99 | — |
| Ninth Edition | 309★ | Uncommon | — | $14.99 |
| Exodus | 138 | Uncommon | $3.99 | — |
| Magic 2010 | 220 | Uncommon | $4.49 | $8.99 |
| The List | 10E-343 | Uncommon | $3.49 | — |
One ruling from Wizards of the Coast
- 1 October 2009If multiple effects modify your hand size, apply them in timestamp order. For example, if you put Null Profusion (an enchantment that says your maximum hand size is two) onto the battlefield and then put Spellbook onto the battlefield, you'll have no maximum hand size. However, if those permanents entered in the opposite order, your maximum hand size would be two.