that's a trick question really.  wonderbook is an interactive reading experience.   soo really it depends on the content of the book..

i really liked book of spells in a large part because i'm a huuge harry potter fan.  you learn about the history of the spells and how to cast them (all written by rowlings in her unique humorous style).  book of spells is kind of in the same area as tales of the beetle bard (which i have the $150 replica verision xD) or quittage though out the ages.  fun side deversions.

i don't think it will get a lot of support.  don't look at is as an investment.  think of it as $15 for this game.  do you want it?  i like it.  it isn't long and it doesn't have a ton of replay but it was a really fun ~6hours.  ..and the easier plat ever if your into that.

so i'll leave you with this.   i'm going to buy book of potions.