What Is The Kelley Blue Book For Guitarist

I was recently checking the stats for favorite searches here at Guitar Answers, and the "Kelley Blue Book" of guitars(electrics and acoustics) was the most popular.So here is some info on what the writer offers concerning this.To begin with,the whole Kelley word is a bit confusing!Because if you go to the site it is Blue Book Publications.And i guess the whole thing actually started with cars.In addition there is info and prices for guns along with another publication for electric guitars,one for acoustic guitars and another for amps.And in addition there are four other publications,one for the Gibson Flying V guitar and another for Martin guitars and one for Gibson guitar and another for PRS guitars.So...there are actually,who knows(each time i visit the site,a NEW publication pops up) books for guitarist to purchase!Below is the actual site address for the "Blue Book Publications"....
Here are descriptions of the three main books...
Electric Guitars...The guitar industry’s most comprehensive publication on electric guitar information and pricing has been dramatically increased and improved! The new 11th Edition Blue Book of Electric Guitars™ is now over 1,150 pages, and features hundreds of new images.
Acoustic Guitars...The guitar industry’s most comprehensive publication on acoustic guitar information and pricing has been dramatically improved! The new 11th Edition Blue Book of Acoustic Guitars™ is now over 700 pages, and features hundreds of new images.
Guitar Amps...The only comprehensive and up-to-date guitar amplifier pricing book is now available! Finally, you can get the detailed information you’ve been looking for on such famous trademarks as Fender, Marshall, Vox, Mesa-Boogie, Ampeg, and others.
... https://store.bluebookinc.com/Guitars/Default.aspx