same price as a normal passport book.
this comes in handy if you travel frequently, especially if you travel to countries that require a visa. visas take up full pages by themselves and sometimes the country will also require you to have an additional number of blank pages as well.
related: it’s about to cost you more money to get a passport.
while a passport is valid for 10 years, once you fill up all of your pages you have to apply for a new passport all together. before 2016, you could simply order new pages but that rule is no longer in effect. by choosing to get the larger book you potentially 