There are some great resources out there to help you on your Advent journey!
Here are a few links and a couple phone app suggestions.

CRI / The Voice website — This is a resource site, they post the lectionary and other daily Bible readings. You can also get good articles on liturgy, theology and other helpful topics. 
Vanderbilt Divinity School posts a really clean and easy version of the lectionary that might be helpful for your Sunday and weekly scripture readings. 
 
There are also some great phone & iPad apps that i have found helpful. 
Here are the two i use the most. I’ll share more in following days and weeks. 

#1. BCP for the iPhone or iPad — This is a great app that contains the entire Book of Common prayer. The daily office and Sunday lectionary readings (daily and weekly readings) are essentially the home page to the app. This makes it really easy to always have your daily Bible reading with you. 

#2. YouVersion — this is a Bible app you can get on pretty much any mobile or tablet platform. It allows you to download different versions of the Bible right onto your phone. I use it for the Bible reading plans they have. They have a few Advent / Christmas reading plans you should check out. 

There are also A TON of Advent calendar apps for iPhones users. I’m going to post a couple of my favorites tomorrow. But today, you should search and find some of your own favorites! 

As mentioned, the Sunday readings in your book are for year B of the Revised Common Lectionary. 
The best place to find all of these years & readings listed are CRI / The Voice website

The Church Year begins with Advent in November/December.
Here is a quick look at the breakdown of years from the Revised Common Lectionary.
Click on the year below to take you to the Sunday readings you are looking for.
Year A:   2016-2017, 2019-2020
Year B:  2017-2018; 2020-2021
Year C:   2015-2016; 2018-2019