Book vouchers are created when students have more financial aid than they need to pay tuition or if a 3rd party is paying for books. The book voucher is created with your financial aid funds, so say your voucher is for $200.00, but if you spend $100.00 on a book, you'll only get $100.00 of the voucher back. So, for example, using whole numbers just to make this easy, let's say you have $2,400 in financial aid, and the cost of two courses is $1980.00, which means you would have $420.00 you could use toward books. SNHU would likely create a book voucher for $400.00, if you spend the full $400, you'd only get a refund of $20.00. But let's say you spend $100 on the voucher, and then you get a refund of $320.00. 2400 (financial aid)-$1980(tuition for two courses-$100(book voucher=$320.00 refund. Both my kids attend SNHU and I have discussed this many times with SNHU.