Here is my take on a book tracker/counter using cards to track your reading progress throughout the year. Setup includes profiles for either 3 sets of number cards (0-9) which will take you up to 999 or a hybrid set with 2 number sets and some images (399 total). All cards neatly store in their slots so no need for additional storage options. 
 

• Tracker prints in 2 parts - Top and Bottom - with registration slots modeled in to help with alignment. I never really liked the finish on support structures in any orientation. Registration marks are friction fit and will hold up through use but just a bit of glue to permanently affix them is my suggestion. 
   
• Each slot will hold 1 full stack of 10 cards for storage. As you read, just slide up, out and move to the back. 
   
• Word of advice on cards - Make sure you let your cards fully cool on the build plate to prevent warping/bending them which WILL affect the fit of the cards (Ask me how I know). 
   
• Included a Blank Card on plate 2 for you to drop in any of your own images/svgs in the slicer if you are looking for some unique alternatives. 
  • The Numbers/Images on my cards are .4mm deep which is more than enough for black but mileage may very if doing different colors. 

If you are looking for a different aesthetic, check out my dice based book tracker here: 

Book Tracker with Dice