Generally excellent recommendations. Print format is a good "fall back" in countries with unreliable energy supplies and/or non hard wired ICT infrastructure. Print format rapidly becomes obsolete and new editions required. Print format is susceptible to vermin, insects, environmental conditions, catastrophic weather, wear and tear of handling and transport. Print is weighty with the negative affects on students skeleton and musculature. Digital format should provide the instructors additional support with tracking student progress, constant automated assessments/analysis/reports. Print may be initially less costly upfront but has these downsides that ultimately lead to higher hidden costs.