We found 3 Reddit comments about Seinlanguage. Here are the top ones, ranked by their Reddit score.
https://www.amazon.com/Seinlanguage-Jerry-Seinfeld/dp/0553569155
There's always Seinlanguage.
I know this goes against your original question, but I was told by comedy teachers to not get too caught up in reading comedy books (ex: how-to's). Before I started doing improv, though, I read "Bossypants" by Tina Fey (I do stand-up now). It's a quick, easy read and the writing's awesome. Ellen Degeneres: also a great writer. Found [this] (http://www.amazon.com/Seinlanguage-Jerry-Seinfeld/dp/0553569155/ref=sr_1_1?s=books&ie=UTF8&qid=1414942127&sr=1-1&keywords=jerry+seinfeld) too.
https://www.amazon.com/Seinlanguage-Jerry-Seinfeld/dp/0553569155
There's always Seinlanguage.
I know this goes against your original question, but I was told by comedy teachers to not get too caught up in reading comedy books (ex: how-to's). Before I started doing improv, though, I read "Bossypants" by Tina Fey (I do stand-up now). It's a quick, easy read and the writing's awesome. Ellen Degeneres: also a great writer. Found [this] (http://www.amazon.com/Seinlanguage-Jerry-Seinfeld/dp/0553569155/ref=sr_1_1?s=books&ie=UTF8&qid=1414942127&sr=1-1&keywords=jerry+seinfeld) too.