Yes, this is encyclopedic as the title suggests but Colin Jose completely ignores the NASL indoor ventures. Remember the NASL, not the MISL, was the one who started playing some indoor games and tournaments. It was also the attempt to compete with the MISL indoors that caused the NASL to fracture (the San Diego Sockers and Chicago Sting became two teams who preferred indoor soccer over the outdoor version).
Anyway, the outdoor game is covered very well and I refer to this book often. It could use some tweaking as the team roster and lineups is too old Rothman's Football League style from the '70s. It's hard to read down and across with letters assigned to each player to see what matches they played in. Sooner have just had a team roster with games played, goals and assists and for goalies goals against averages and save percentages.
The pics are nice but far too many boring headshots.
Given this is really the only thing out there, it'll have to do but it could have been spectacular with a bit of better editing.