part Part 1. Partitions of Vector Spaces -- chapter 1 Quasi-subgeometry Partitions -- chapter 2 Finite Focal-Spreads -- chapter 3 Generalizing André Spreads -- chapter 4 The Going Up Construction for Focal-Spreads -- part Part 2. Subgeometry Partitions -- chapter 5 Subgeometry and Quasi-subgeometry Partitions -- chapter 6 Subgeometries from Focal-Spreads -- chapter 7 Extended André Subgeometries -- chapter 8 Kantors Flag-Transitive Designs -- chapter 9 Maximal Additive Partial Spreads -- part Part 3. Subplane Covered Nets and Baer Groups -- chapter 10 Partial Desarguesian t-Parallelisms -- chapter 11 Direct Products of A¢ ne Planes -- chapter 12 Jha-Johnson SL(2; q) C-Theorem -- chapter 13 Baer Groups of Nets -- chapter 14 Ubiquity of Subgeometry Partitions -- part Part 4. Flocks and Related Geometries -- chapter 15 Spreads Covered by Pseudo-Reguli -- chapter 16 Flocks -- chapter 17 Regulus-Inducing Homology Groups -- chapter 18 Hyperbolic Fibrations and Partial Flocks -- chapter 19 j-Planes and Monomial Flocks -- part Part 5. Derivable Geometries -- chapter 20 Flocks of -Cones -- chapter 21 Parallelisms of Quadric Sets -- chapter 22 Sharply k-Transitive Sets -- chapter 23 Transversals to Derivable Nets -- chapter 24 Partially Flag-Transitive A¢ ne Planes -- chapter 25 Special Topics on Parallelisms -- part Part 6. Constructions of Parallelisms -- chapter 26 Regular Parallelisms -- chapter 27 Beutelspachers Construction of Line Parallelisms -- chapter 28 Johnson Partial Parallelisms -- chapter Part 7. Parallelism-Inducing Groups -- chapter 29 Parallelism-Inducing Groups for Pappian Spreads -- chapter 30 Linear and Nearfield Parallelism-Inducing Groups -- chapter 31 General Parallelism-Inducing Groups -- part Part 8. Coset Switching -- chapter 32 Finite E-Switching -- chapter 33 Parallelisms over Ordered Fields -- chapter 34 General Elation Switching -- chapter 35 Dual Parallelisms -- part Part 9. Transitivity -- chapter 36 p-Primitive Parallelisms -- chapter 37 Transitive t-Parallelisms -- chapter 38 Transitive Deficiency One -- chapter 39 Doubly Transitive Focal-Spreads -- part Part 10. Appendices -- chapter 40 Open Problems -- chapter 41 Geometry Background -- chapter 42 The Klein Quadric -- chapter 43 Major Theorems of Finite Groups -- chapter 44 The Diagram.