The Clifford Simak Collection 4 Books set 2: Ring Around the Sun, Project Pope, Highway of Eternity, Mastodonia.

The Clifford Simak Collection 4 Books set 2: 
-Books: Ring Around the Sun.

A classic tale from one of science fiction's most creative forces. Suddenly, strange things begin to happen. World industries collaspe. People--sometimes whole towns--disappear without a trace. And writer Jay Vickers knows he's being watched. Now, to save his own life--and all of humanity--he must solve the secrets of the parallel Earth. "Lovely, rationalized magic".--The Times (London)

-Books: Project Pope.

The return of Simak's favorite themes--including esp, robots & religion--in a thoughtful, gentle, delightfully original treatment. On the remote planet End of Nothing, a colony of advanced robots has established project Vatican-17: the building of an infallible computerized pope whose accumulated wisdom will eventually create a truly universal religion. Gathering data for the omnivorous Pope are the Listeners, humans with ESP whose agile minds probe thru time & space. Also hanging about, on the fringes of the utopian settlement, is reclusive, anachronistic Thomas Decker & his invisible companion, Whisperer, a childlike alien of awesome latent powers. Best of all in this cast of charmers are some wonderfully Simakian robots: a beguilingly crusty electronic Pope & his splendidly idiosyncratic robot Cardinals. A lovely place--but then Listener Mary appears to have discovered Heaven (literally); the resulting rancorous dispute (Decker is murdered by a robot, there's a movement to canonize the now-insane Mary) threatens to tear Vatican-17 apart; & the conclusion--involving some secretive, puissant autochthones, trips to weird worlds, a Decker clone & a trio of peevish, megalomaniac aliens--is carried thru with just the right blend of wackiness & humility. Thoroughly enjoyable: one of the best ever from an sf grandmaster whose form has been decidedly variable in recent years.--Kirkus

-Books: Highway of Eternity.

Two present-day investigators race across time to escape malevolent aliens from the future and their terrible "gift" of immortality in this science fiction classic.

What is the price of eternal life? Secret agent Jay Corcoran is about to learn the answer when his investigation into an inexplicable disappearance carries him and journalist friend Tom Boone hundreds of years into the past. Corcoran and Boone's powerful extrasensory abilities lead them to an advanced transportation system through time and back to the bucolic 18th-century English countryside. There, they discover a family from the distant future that is hiding from the Immortals - an alien race that, many centuries on, is seducing human subjects with the promise of immortality. But the cost of life eternal is the corporeal self, and there is no place in the aliens' future for anyone unwilling to exist as mind alone.

Now that the Evans family's sanctuary has been breached, escape is the only answer - for Tom Boone and Jay Corcoran as well - and the only way out is forward...far forward. But racing through space and time can be a hazardous occupation, especially with monstrous beasts, killer robots, and Immortal body destroyers waiting at every juncture

-Books: Mastodonia.

"The time trails led him to mastodons, money and the most amazing mystery of all: time."
Published as Catface in the UK. A cat-faced alien stranded in drift-free Wisconsin befriends locals and time-engineers portals into prehistoric epochs, where they establish a new nation: Mastodonia