51
invisible bookshelf
Worth a lookShows a sweet-spot price point ($21.09 avg), but a small market ($56K/yr) keeps it on the watch list.
Avg price
Great$21.09avg listing price — sweet spot $15–$100
Price range
Great$9.03–$85.91cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Great57%top-5 brand share — no brand owns this niche
Competition
Great40%top-5 click share — an open shelf
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Growth
Good+22.0%90-day search growth — must beat 0% to launch
Returns
Okay3.6%return rate — above 5% kills the launch gate
Review moat
Okay3,932.33avg incumbent reviews — the moat a new listing must climb
Market size
Bad$56K$56K/yr · 240K searches
Conversion
Bad1.1%search→purchase rate — share of searches ending in a sale
Signals No Dominant Brand