Couple questions about letter hacks:

1) Does Compendium One (collects TWD Issues #1 to #48) include any letter hacks?

2) Because I'm not looking forward to buy every issue separately, is there any other way to read Letter Hacks from #1 to #48? Does any other compendium or sumthing include the letter hacks? As far as I'm concerned at least issue 1 and 48 don't have letter hacks but still? Thanx.