corrected typos

Author: Chandan Rai

Chapter10/chapter10.md

@@ -498,7 +498,7 @@ The full source code of `practicalnode/ch10/cluster.js` is as follows:
         cluster.worker.process.pid, port);
       var app = express();
       app.get('*', function(req, res) {
-        res.send(200, 'cluser '
+        res.send(200, 'cluster '
           + cluster.worker.process.pid
           + ' responded \n');
       });

Chapter2/chapter2.md

@@ -242,7 +242,7 @@ To double-check the installation of Express.js and its dependencies, we can run
 
 # Express.js Scaffolding
 
-So far, we've covered Expres.js installation. When it comes to prototyping, it's vital to be able to get started quickly with the solid app skeleton, which is why many modern frameworks provide some type of scaffolding. Now is the time to explore its rapid app creation mechanism— Express.js Generator!
+So far, we've covered Express.js installation. When it comes to prototyping, it's vital to be able to get started quickly with the solid app skeleton, which is why many modern frameworks provide some type of scaffolding. Now is the time to explore its rapid app creation mechanism— Express.js Generator!
 
 Comparable with Ruby on Rails and many other web frameworks, Express.js comes with a CLI for jump-starting your development process. The CLI generates a basic foundation for the most common cases.
 

Chapter3/chapter3.md

@@ -48,7 +48,7 @@ Most of you have heard about TDD and why it's a good thing to follow. The ma
 
 - Verify that the test passes
 
-BDD is a specialized version of TDD that specifies what needs to be unit-tested from the perspective of business requirements. It's possible to just write test with good old plain core Node.js module `assert`. However, as in many other situations, using a framework is more preferabble. For both TDD and BDD, we'll be using the Mocha testing framework because we gain many things for “free.” Among them are the following:
+BDD is a specialized version of TDD that specifies what needs to be unit-tested from the perspective of business requirements. It's possible to just write test with good old plain core Node.js module `assert`. However, as in many other situations, using a framework is more preferable. For both TDD and BDD, we'll be using the Mocha testing framework because we gain many things for “free.” Among them are the following:
 
 - Reporting
 - Asynchronous support

Chapter5/chapter5.md

@@ -547,7 +547,7 @@ The configs now include more Connect/Express middleware, the meanings of most of
 	app.use(require('stylus').middleware(__dirname + '/public'));
 	app.use(express.static(path.join(__dirname, 'public')));
 
-For development, we use the standart Express.js 4 error handler that we imported earlier with `require`:
+For development, we use the standard Express.js 4 error handler that we imported earlier with `require`:
 
 	if ('development' == app.get('env')) {
       app.use(errorHandler());

readme.md

@@ -34,7 +34,7 @@ If you'd like to contribute financially towards the effort (or any of my other o
 
 # In-person Training
 
-Practical Node is a work of 30+ in-person courses, workshops and classes delivered by me in-person at various companies (Walmart Labs, Cisco, Intuit, Starbucks, Capital One, OnDeck, HubSpot, VMWare to name just a few), dev schools (Hack Reactor, DevBootcampm, Flat Iron NY, etc.) and conferences (ForwardJS, Node Interactive and others). If you need corporate onsite in-person training delivered by me, then [send me a message](https://webapplog.com/azat).
+Practical Node is a work of 30+ in-person courses, workshops and classes delivered by me in-person at various companies (Walmart Labs, Cisco, Intuit, Starbucks, Capital One, OnDeck, HubSpot, VMWare to name just a few), dev schools (Hack Reactor, DevBootcamp, Flat Iron NY, etc.) and conferences (ForwardJS, Node Interactive and others). If you need corporate onsite in-person training delivered by me, then [send me a message](https://webapplog.com/azat).
 
 # Online Video Training
 
@@ -46,7 +46,7 @@ TBD
 
 # Supporters
 
-Practical Node, 2nd Edition was supported through the Kickstarter campagin (funded in just three days). Thank you to the major backers of the book:
+Practical Node, 2nd Edition was supported through the Kickstarter campaign (funded in just three days). Thank you to the major backers of the book:
 
 * **[DevelopIntelligence](http://www.developintelligence.com): Managed learning solutions including training design and development, program delivery and management** - $500
 * Matthew Amacker - $200