It’s very possible that I’m misremembering this, but I seem to recall reading that the Lane estate had some legal difficulties trying to get Powers Of Ten reissued. If that’s true, it might mean that Warner Bros. owns the publishing rights, and that might be a problem for a POT tab book.
Also, I’m not super sure what I a tab book could offer that would make it worth printing. Rules Of The Game, Gray Pianos Flying, Illusions and Epilogue for Lisa were all transcibed in the Power Licks & Power Solos tab book, which isn’t difficult to find online. Shawn teaches the Esperanto solo on Power Solos, which is also easy to find online. That’s pretty much the entire album except for Get You Back, which was transcribed by Guthrie Govan for Guitar Techniques and is easily found online, and which Shawn taught part of on Power Solos.
West Side Boogie is a Ray Gomez cover, which could cause more trouble with rights. I don’t think most guitarists really care about the other tracks, the middle section of POT is mostly keyboard tracks.
None of the transcriptions are perfect. POT was very composed, so if a transcriber like @LeviClay88 had footage to some good unreleased video, then maybe they could do better. Maybe there’s enough good footage of already available from different POT-era gigs.
I’d buy it in any case, and a reissued CD or lossless audio of the album too.