not sure if this will help anyone but I dont actually use a "price book" - mine is incorporated in my coupon box:
In my coupon box (a 3x5 index card box) I made "folders" for the coupons with the tab reading the category - cut down old file folders - card stock quality
on the front of the folder (you dont see it until you pull the folder up) I can write prices as well as notes (like DH doesnt like X brand of deoderant or X brand of veges is bad or dont buy X type of soup)
I have used the same box (the lid is duct taped on) and folders (a couple have been eliminated / added over the years based uopn family changes) since 1995 !!! it is interesting to be able to see the price change over the years... I also keep the box in a little tote bag (like size of a lunch box with small straps - a Longaberger one from pre-frugal days!!) so I dont worry about it opening and spilling as it moves around in the car!
my categories are in alphbethical order - i will try to remember them all for you
misc - has things like candy and batteries and weird coupons
baking, bread/cereal, cats/dogs, cleaning, deoderants, dairy, hair, face/skin, frozen, laundry, medicine, meat, personal, snacks, soda, pasta/pizza, paper, plastic, spices, teeth, ...
I must say I probably look funnny walking into the store - purse, tote bag of coupons, plus my large recyclable tote bags for grocerys... I carry a lot in (I used to get stopped ta walmart because they thought I had a return - I would have to explain that it was my coupon box!)