Adalogical Ænigmas

Ada has published a book!

Yes, that's right: Ada has created a book collecting the first twenty-four of her ænigmas, along with author commentaries, full solutions, explanations of all of the Easter eggs, and a host of other fun features!

We recently concluded a Kickstarter campaign to support publishing that book, and it went great! Not only did we hit our initial goal, but we also funded the launch of a brand-new puzzle series, the Ænigmatic Addenda! (We'll be putting up more information about that series here soon, but in the meantime you can read about it on our Kickstarter page.)

Welcome, gentle solver!
Each month, I provide solvers around the world with a fresh challenge to their powers of logical deduction in my series of Adalogical Ænigmas. In addition to its value as intellectual stimulation, however, each ænigma also serves as a contest! If you solve an ænigmaduring the month of its publication, you could win a free physical puzzle from among the wares offered by Pavel's Puzzles!
What follows is a catalogue of all of the ænigmas yet made available to the solving public. Each puzzle image links to one or more pages of content concerning that ænigma, including a copy of the ænigma itself and, on occasion, a trove of useful pedagogical materials for those encountering difficulties in solving it.
I have penned a series of general advice for the solution of my ænigmas. I pray you will consult it if you are a newcomer to this sort of logical conundrum.
With sincere hopes for your imminent befuddlement (and eventual enlightenment),
#40: February, 2017
#39: January, 2017
#38: December, 2016
#37: November, 2016
#36: October, 2016
#35: September, 2016
#34: August, 2016
#33: July, 2016
#32: June, 2016
#31: May, 2016
#30: April, 2016
#29: March, 2016
#28: February, 2016
#27: January, 2016
#26: December, 2015
#25: November, 2015
#24: October, 2015
#23: September, 2015
#22: August, 2015
#21: July, 2015
#20: June, 2015
#19: May, 2015
#18: April, 2015
#17: March, 2015
#16: February, 2015
#15: January, 2015
#14: December, 2014
#13: November, 2014
#12: October, 2014
#11: September, 2014
#10: August, 2014
#9: July, 2014
#8: June, 2014
#7: May, 2014
#6: April, 2014
#5: March, 2014
#4: February, 2014
#3: January, 2014
#2: December, 2013
#1: November, 2013