Similarly, my pediatrician hands out an age-appropriate book at each visit.
My kids got those books for years and it was fun and nice to come home to such a generous and quality gift. But the library, library book sales, and other local sources like garage sales or credit-swapping consignment shops are also enough alone around here to pile the books quite high. In addition, screen time is absolutely wicked these days compared to when I was a kid. Hoopla is amazing, as are the various sandbox games in which you can mine, farm, build, design, and just explore. I grew up glued to the computer so I take a pretty "whatev" approach as long as I know the screen-activity characteristics are broadly "good" or better yet "fitting for my kid's psychological needs".
The thing I really like about this program, that I have a difficult time doing in my own, is a regular age-appropriate book. It's hard to remind yourself every few weeks to try something new. When you think of books you liked as a kid, like "there's a monster at the end of this book," isn't always at the right level for your child and I always err on what he liked yesterday not really knowing what he'll grow into next.