I've got books lining my shelves, day and night...

So today, in our travels, mom and I stopped by Ollies, where I picked up four books:

King Arthur And The Knights Of The Round Table, by Roger Lancelyn Green
Ten Mile River, by Paul Griffin
Fried Green Tomatoes At The Whistle Stop Cafe, by Fannie Flagg
Two Americans: Truman, Eisenhower And A Dangerous World, by William Lee Miller

And this is the current year list:

Feb 1: 5 books for $15.61; average of $3.12 each
Feb 1: 2 books for $22.51, average of $11.26 each
     Total: 7 books for $38.12; average of $5.45 each 
Feb 15: 1 book for $9.10
     Total: 8 books for $47.22, average of $5.90 each
Mar 4: 2 books for $17.52, average of $8.76 
     Total: 10 books for $64.74, average of 6.47 each
Mar ??: 1 book for $10.98
     Total: 11 books for $75.72, average of $6.88 each
Mar 28: 3 books for $10.57, average of $3.52 each
     Total: 14 books for $86.29, average of $6.16 each
Apr 9: 3 books for $40.47, average of $13.49 each
     Total: 17 books for $126.76, average of $7.46 each
Apr 17: 1 book for $9.17
     Total: 18 books for $135.93, average of $7.55 each
Apr 18: 4 books for $11.62, average of $2.91 each
     Total: 22 books for 147.55, average of $6.71 each

POLT