My new book was just published by GIA! The first volume of Improvisation Games for Classical Musicians was published in 2008 with something like 566 nonjazz, non-notated (i.e. prose descriptions) games (much better word than “drill” or “exercise”), 354 p., with generous sections of explanatory material and resources for further study. This new volume is the result of about nine years of collecting and inventing new games. It contains 642 new games in 374 pages; there are fewer categories than in Vol. I (which is not labeled Vol. I, by the way), but there are mostly more games per category and there are some new categories as well (e.g. Movement Games). There is less explanatory material – just summaries; didn’t want to repeat all that in Vol. I, with perhaps just slightly less in Resources (more new material). But there are considerably more games, and many of these games come with variations (up to 18 variations on occasion); most teachers will be able to tweak these games and variations to suit their needs as well as be inspired to invent new ones, so these 642 can easily become thousands and thousands. And note that you can repeat games and never have them be the same twice.
If you are new to these improv games, you probably should start with Vol. I and absorb the explanatory material. If you have your copy of Vol. I, you will want to order Vol. II and enjoy the vast array of new ideas and offerings. And: once you have taken some games out for a spin, I always appreciate feedback on how it went. Or your ideas for new games. I will post a few of the new games here as samples, and would be delighted to post some of your new games as well if you would like to share.
In any case, have fun!