7 Magic by the Numbers books in order

Vendora, the crafty queen under siege in a castle that had never fallen.

Alodar, the mere journeyman, learning the least of the five crafts of magic.

He had no right to aspire for her hand --- but aspire he did!

Wizards, sorcerers, dragons, castles, and more!

Alodar's quest takes him… show more.

The laws of magic were changed
All five traditional crafts no longer worked
What was in their place?
Lyndon Hardy brings us a story in which the rigorous application of logic gives an added dimension of reality to fantasy - Lester del Rey

The laws of the five magics were… show more.

Besides the realm of humans, there are at least six more
In each, the laws of magic are different
Find out what they are.
Lyndon Hardy's incisive logic makes the wildest flights of fantasy believable -- and fascinating" -- Lester del Rey

The worst of the mess they were in,… show more.

A strange planet with different technology
No one knows about magic
Or do they?
A fun read. It sticks to the rules [Hardy] laid out 30 years ago, [but this time] the stakes are higher. - Larry Niven

Finally! A book in the Magic by the Numbers series that has… show more.

Is time immutable?
Can stepping on a butterfly in the Jurassic change human history?
Might denizens of the realm of demons have something to do with it?
You bet!
Fig stumbled a step backward. No towering devil stood before him as he had imagined … and feared. No great beast… show more.

Our reality is governed by physical laws
Fantasy novels obey different ones
Find out what happens when the two are mixed

Praise for the previous books in the Magic by the Numbers series:
One of the most logical detailing of the laws of magic ever to appear in fantasy –-… show more.

A stand-alone novel of magic adventure and fantasy romance

Review from reedsy Discovery:

One Last Heist is a big, bold, and brilliant book that grabbed me from the first page and didn't let go till the last. It's billed as fantasy fiction but, as far as I can tell, it… show more.