Here are some "introductory yet comprehensive" books about programming with Scheme that will help you get proficient with Guile and other Scheme implementations:
Felleisen et al's How to Design Programs: https://htdp.org/ Havrey and Wright's Simply Scheme Springer and Friedman's Scheme and the Art of Programming Out of these I recommend Havrey and Wright's Simply Scheme the most. It has the best treatment of input/output and text processing, a couple of large realistic projects (a spreadsheet and a database), and a chapter on Common Lisp. Vladimir
