In a spacious public library with a high ceiling and rows of bookshelves, two friends, Amardeep and Yoshiko, are playing a game of hide-and-seek. Amardeep is seeking and Yoshiko is hiding. The bookshelves are arranged in a grid pattern, creating a series of aisles and cross aisles that allow visibility down their lengths but not across them. Each bookshelf is filled with books and there's no space to see through from one aisle to the next except at the cross aisles intersections. The library also has a few tables and chairs scattered around, but they are low enough not to obstruct the view down the aisles. There are four large round pillars in the library as well, which provide some cover but are not as encompassing as the bookshelves.

Amardeep starts counting at the library's entrance and faces the wall, promising not to peek as Yoshiko runs off to find a hiding spot. Yoshiko darts behind a pillar that is diagonally positioned from the entrance but still in Amardeep's line of sight, should he turn around after finishing counting. Aware of this, Yoshiko quickly crouches and stealthily moves, staying close to the shelves, to another pillar farther away from Amardeep's initial position and not directly visible from where Amardeep begins. To ensure she is not easily seen, she positions herself on the side of the pillar opposite to Amardeep's anticipated path.

As Amardeep finishes counting and turns around, he decides to walk down the middle aisle to have a better chance of spotting Yoshiko hidden along one of the cross aisles. He knows that his friend understands the layout well and wouldn't choose an obvious hiding place. While he walks, he carefully examines each cross aisle intersection for any sign of Yoshiko. 

What will Amardeep be able to see as he walks down the middle aisle and how should he proceed to effectively seek Yoshiko? Will he be able to see her from the middle aisle considering her chosen hiding spot, or will he have to change his approach?
As Amardeep traverses the main middle aisle, his line of sight is restricted to the lengths of the cross aisles that intersect with the middle aisle he is walking down. He cannot see through the bookshelves themselves. Therefore, if Yoshiko is crouched behind a pillar that is not directly visible from the middle aisle, she remains out of sight for now. Since Yoshiko has chosen a pillar that is offset from Amardeep's original starting position and the middle aisle, she remains hidden.

While walking down the middle aisle, Amardeep will only have a clear view down the cross aisles. Since Yoshiko is not hiding in a cross aisle, but rather at the side of a pillar outside his direct line of sight, he won't be able to spot her immediately. For Amardeep to effectively seek Yoshiko, he will need to vary his viewpoint. This could mean he will check around the pillars, as the pillar bases provide the only reasonable cover that is not directly visible from the middle aisle.

Yoshiko's position behind a pillar, and specifically on the side opposite Amardeep's approach path, means that Amardeep's initial strategy won't reveal her hiding spot even if she can see him approaching; Amardeep's view of her hiding spot will be obstructed by the width of the pillar. To locate Yoshiko, Amardeep will need to either peer around each pillar as he passes or change his path to walk around the library's perimeter, where he could catch sight of her from a different angle. Another effective strategy would be to walk down each cross aisle, which would eventually give him a line of sight to the area behind the pillars where Yoshiko is hiding.

Strategically, if Amardeep suspects that Yoshiko might be utilizing the pillars as cover, he should approach each pillar methodically, checking each side as he goes. Since the tables and chairs are low and won't obstruct a standing person's view, he can rule them out as potential hiding spots after a quick glance. Amardeep's best course of action would be to make his way towards the outer edge of the library or another cross aisle from which he can scan the sides of the pillars that were not visible from his original path. This would maximize his view of the hidden spots while still covering the open areas.

Amardeep will not be able to see Yoshiko from his current path down the middle aisle due to his limited field of view. To find her, he will need to either check around each pillar as he goes or change his path to walk around the periphery of the library. If he does this persistently, he should be able to find Yoshiko.