BookwormPup64 is built from a "Puppy builder" system named Woof-CE (Woof-CE at GitHub), which can build a Puppy Linux distribution from the binary packages of another distro.
There are many "puppies" built with Woof-CE using, for example, components from Debian, Ubuntu, Slackware and Arch.
Each "Puppy distro" built by Woof-CE is a distinctive distribution in its own right, with unique features. You choose a puppy based on your particular needs, be it specific hardware, software, or access to and compatibility with the package repositories of a particular major distro.
Since November 2013 Puppies are built with Woof-CE.
You can view the full commit log of Woof-CE "Testing" branch at the following link: Woof-CE Testing Branch at GitHub.
S15Pup 22.12 - December 2022
FossaPup64 9.5 - September 2020
Raspup 8.2.1 - August 2019
BionicPup32 8.0 - April 2018
BionicPup64 8.0 - March 2019
XenialPup 7.5 - December 2017
XenialPup64 7.5 - December 2017
Slacko Puppy 7.0 - January 2021
Slacko64 Puppy 7.0 - January 2021
Slacko Puppy 6.3.2 - November 2015
Slacko64 Puppy 6.3.2 - November 2015
Slacko Pup 5.7.0 - March 2014
Tahrpup 6.0.5 - October 2014
Tahrpup64 6.0.5 - October 2014
Puppy 4.3.1 (2009-10-17)
Quirky 1.0 (2010-05-05)
Quirky 1.1 (2010-05-15)
Quirky 1.2 (2010-06-05)
Quirky 1.3 (2010-09-22)
Quirky 1.4 (2010-11-27)
Wary 5.0 (2010-12-29)
Wary 5.1 (2011-02-19)
Wary 5.1.1 (2011-02-25)
Wary 5.1.2 (2011-05-25)
Wary 5.1.3 (2011-08-15)
Wary 5.1.4 (2011-08-29)
Wary 5.2 (2011-10-15)
Wary 5.2.2 (2011-11-17)
Wary 5.3 (2012-4-7)
Precise 5.4 (2012-10-23)
Precise 5.4.1 (2012-11-10)
Precise 5.4.2 (2012-11-30)
Precise 5.4.3 (2012-12-18)
Wary and Racy 5.5 (2013-03-03)
Precise 5.6 (2013-05-21)
Precise 5.7 (2013-07-29)