Built this using the Ana White plan. Construction was done in less than a day using leftover lumber from other repairs around the house. Painting and varnishing took multiple days for the paint and varnish to dry and cure though.
Used pocket screws - as shown in my diagram - to hold the pieces together.
The family has enjoyed using the desks and if you stack one on top of the other, the bottom one creates a shelf also. Will make a few more to share.
Thanks for sharing the plans.